
To burn fat without losing muscle there are two options when it comes to cardio and they’re at extreme opposite ends of the spectrum.
You can either do very high intensity cardio (sprint).
Or you can very low intensity cardio (walk).
It’s the midrange stuff that presents a problem for most people.
When you hop on a machine and go at it with moderate-high intensity for 30-40 minutes you will get all of the negative effects associated with cardio (increased cortisol, muscle loss, overuse injuries, decreased power output- meaning you’ll be less explosive, etc.).
Why I Hate “Interval Training”
Many people know that traditional cardio sucks so they recommend intervals.
I personally hate intervals.
On a bike, stair climber, ski machine thingy and whatever else they stock Bally’s and Gold’s with these days…
Especially the rowing machine. Thirty minutes of repeated spinal flexion sounds fun but I think I’ll pass.
According to typical interval training prescriptions you’re supposed to push as hard as you can for 30 seconds followed by a lower intensity period of 90 seconds, or something along those lines.
No matter what anyone says that will also sap your power production because the lactic acid buildup is massive.
Lactic acid is the arch enemy of fast twitch muscle fibers.
Sprint to Lose Fat & Keep Your Muscle
A better option for intervals would be to rage against the machines and get outside and sprint.
But who do you know personally that can sprint for thirty seconds straight? That would be over 200 yards! Talk about an injury waiting to happen.
Yet that’s what interval training enthusiasts regularly advise their normal 40 year old office worker client to do.
To sprint for 30 seconds, followed by a 90 second rest period, over and over for 10-20 minutes straight is nearly impossible for most non-Olympians. And risky as hell.
If you want to sprint like a sprinter.
Not a nitwit.
Start Slowly
Start with short distances and slowly work your way up over time. Take adequate rest periods and slowly decrease them as you get in better shape.
If you’re an average dude it will take you in the neighborhood of 6-7 seconds to run a 40 yard sprint. And that would be a very far distance for your first time sprinting.
I’d recommend sticking with 20’s your first few weeks.
So instead of the silly recommendation of sprinting for 30 seconds straight I advise you to sprint for two or three seconds straight.
HUGE difference. 
It’s funny that intelligent strength coaches who work with high level football players rarely let their athletes sprint at balls out intensity, 40 yards or more during the off season (because the risk of injury is too high), yet fitness trainers recommend that the average lay person head right out to the track and start running 100’s from day one.
People have got to be more responsible than that. It’ll take months to work up to that distance.
Assuming you are sprinting proper distances and taking care to be safe the next question is how long should you rest?
The truthful, nonspecific answer is… as long as you need to.
Keep track of it and try to improve over time. Everyone’s different.
That’s why when people ask me about specific guidelines for hill sprints I tell them I don’t know. I don’t know what kind of shape you are in and what hills you have available to you. Because you’re really limited by the hills you have.
If I told you that you should be sprinting for 15 seconds yet you could make it up the only hill in your neighborhood in eight seconds would you not sprint up the hill?
Don’t Over-Complicate It
You can’t always be a slave to exact prescriptions; sometimes you need to just man up and do work… son.
Your sets, reps, intervals, whatever, are based on your hill and your fitness level.
Now, eventually you may work your way up to being able to sprint your hill for 30 seconds, followed by a 90 second break and repeat that for 20 minutes straight.
So I guess you could say you’re doing intervals at that point. But who cares?
I call them hill sprints. Like Walter Payton did. If you’re sprinting on a football field or a track just say you’re sprinting.
Don’t actually say to anyone that you’re “doing intervals.” That’s so 2004 and so not cool.
If you had absolutely no other option, for whatever reason, than to do intervals on a bike I’d keep the sprints very short and the rest periods as long as necessary, removing almost all tension from the bike while cruising.
You really want to avoid that extreme lactic acid buildup if you want to maintain your power.
A Better Way to Do Interval Training
The best way to come close to traditional interval prescriptions is achieved by performing a variety of exercises such as swings, burpees, med ball slams, battling ropes, mountain climbers, etc. in a circuit.
Mixing it up prevents the massive accumulation of lactic acid in any one area and is far more beneficial than be locked into the versa climber for twenty minutes.
For athletic purposes I prefer to keep the intervals or work times/set duration lower than 30 seconds. Ten to twenty seconds would be a better idea for power athletes.
This type of “interval training” is often associated with the training of combat athletes.
Low Intensity Cardio
As far as the low intensity stuff goes you can walk with a sled, a light weighted vest, walk up hill, walk through the woods or trails or just walk the streets like Omar from The Wire.
Be sure to whistle The Farmer and the Dell to let the suckas know you’re coming.
The best time to do it is first thing in the morning on an empty stomach.
Try to keep your heart rate at around 65% of max for 30 minutes.
The nice thing about this is there is no negative effect at all. No cortisol, no muscle loss, nothing. And you start your day with some nice fresh air which is great for your health and your mind.
This should be done three times per week, minimum. This will help keep you lean while you’re in the process of trying to gain size and will also help you recover more efficiently.
The old days of bulking and cutting are dead.
A smarter approach is to include some high and low intensity cardio methods year round, skip the traditional cardio machines and never let yourself become an out of shape fat ass.
***
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26. Sep, 2010
at 7:54 am #
Thanks for the great info Jason. I had sent you a message on FB recently addressing almost this exact subject. Great answer to adding cardio to a muscle building program.
Keep the training info coming.
Steve
26. Sep, 2010
at 8:20 am #
Good article but e.g. for a soccer player ( who is already big, strong and explosive) would you say intervals ( fast running, not machines) would be good as soccer players need to have good anaerobic endurance ( lactic acid tolerance)?
So for a soccer player would you say it would be aokay to do intervals as well as hill sprints and sprints?
26. Sep, 2010
at 9:24 am #
Jason Ferrugia: “So I still hate intervals on a bike”
At this point did you refer to the 30+ seconds of high intensity intervals followed by 90 of low intensity for 30 minutes most people do?
At MGS you suggested using stationary bikes (due to no eccentric component) for HIIT: 10-30 seconds of high intensity followed by whatever rest we needed…
this aproach to intervals (just to reduce fat gains during bulking) is, for you, still valid or we would be better at doing some circuit training after workout?
26. Sep, 2010
at 12:42 pm #
Thanks! Very clarifying and to the point.
26. Sep, 2010
at 1:02 pm #
Great post and just when I needed it… The insanity of others was infecting me in my efforts, and this was the whack on the head I needed. Thanks again for the help Jason!
26. Sep, 2010
at 5:23 pm #
Great analysis Jason. I especially like how you recommend shorter sprints. I’m exhausted after sprints of just 10-15 seconds and always wondered how people performed HIIT doing 30-60 second intervals. Excellent points on the morning cardio as well.
26. Sep, 2010
at 6:26 pm #
Thanks for clearing everything up!! This article really nailed my question from the last one thanks brother ..keep on spreading the good word and ill keep readin.
26. Sep, 2010
at 9:54 pm #
Thanks for the post!
I’m with a program in Cairo for another two weeks and I walk home everyday after class (5K) in the afternoon. I’m currently sticking to only bodyweight exercises as the gyms in this area consist mainly of a ramshackle of machines, treadmills, and EZ grip bars. I’m taking your advice on reducing carb intake to mornings in the hopes of getting down from 8.3% bodyfat to 5-6%. With my 5K stroll home in mind, would you suggest I include morning walks as well, or would something else be more appropriate?
27. Sep, 2010
at 6:06 am #
GODDDDDD … I’m so confused… I must be reading too many fitness blogs everybody has their own ideas!.
Anyhow “I’ll draw a line in sand” & do something! and work it out for myself!
I see downloading Tom Ventuo’s ebook he has his own idea on cardio :-P here we go again …
Well since I’ve started your program last month I’ll start off following your suggestion for the next month and see how it goes …walk and sprint and nowhere in between!
Thanks
Raymond
27. Sep, 2010
at 6:37 am #
Hi Jay, I have a few questions regarding this post. You talk about not doing the “intervals” on off-days as it would impede recovery. How about sprints with longer rest periods? Can I do them on off-days, then?
Also, as a former cross-country runner and college soccer player (which is about 1 year ago), I find walking to be extremely low-intensity and since I normally walk for about an hour a day to and from school, it’s really not considered exercise, but more of activity. In such a case, would you advise me to do a light jog instead to get my heart rate up or still stick to walking?
27. Sep, 2010
at 8:12 am #
Excellent post. I think you clearly and concisely answered the cardio question.
27. Sep, 2010
at 8:14 am #
Despite your immense knowledge of fitness, I feel you lack some basics on cardio. Whilst your grasp of low intensity cardio is essentially correct, the kind of training you suggest is perfect to lower your fat ratio, high intensity cardio is basically a way to improve the performance of a critical muscle : the heart.
The key to achieve this is through a combination of high- and low-intensity cardio. High intensity cardio requires interval training but of a different sort of the one you suggest. Short (e.g. 45 sec) sprints (NOT at Max speed) followed by shorter (30 sec) recovery periods, typically done 2×6 times with a 1-2 mn break in between. This way you maximize cardio gains whilst eliminating the production of lactic acid and all the negative aspects associated to it. Very short sprints of the type you mention, whilst good to increase your stamina have zero impact on your cardio performance. Why don’t you share your knowledge with mid distance runners or swimmer coaches ? You’re already one of the most knowledgeable guy on the planet as far as fitness and sport diet is concerned, you could easily expand your knowledge to cardio sports as well (running, cycling, swimming and any combination involving those three !). Best regards, jp
13. May, 2012
at 12:16 pm #
I agree. I was in high school, collage and Airborne Ranger in the Army. Never once did we adhere to your theory. If you talk to any Coach and athlete you will find the workouts intense and lengthy. Nuff Said.
27. Sep, 2010
at 10:20 am #
Jason,
Great post!
Thank you.
I’m going on 61 years old (Dec. 30) and have been using this type of sprint training for the past 15 years. And I can testify it works. I pass it on to my athletes/clients as well and they let me know what success they have with sprint training (anaerobic sprint training, energy system training-EST, intervals; call it what you will) and all done outside or on the practice field (football field, court, mats, etc.).
Great stuff and wished more power/contact sports coaches trainers would realize how much more effective this is.
Thanks again and the best to you and yours.
Stephen
27. Sep, 2010
at 10:35 am #
Another great post Jason…nothing out of the ordinary there. I think you summed it up pretty well about half way in though when you said- “Skinny-fat guys in lab coats who tell you not to do what has worked for countless people need not be taken seriously.” That just about sums it up when it comes to research sometimes. Thanks!
27. Sep, 2010
at 10:48 am #
Great stuff Jason.
Apart from fitness and looking ripped, that “in between” cardio stuff is just plain unhealthy. Mark Sisson writes some good stuff about this, but basically, it keeps your body in a state of systemic inflammation. That is something to avoid regardless of fitness goals or body fat percentages. Don’t get me wrong, I want to be as muscular and ripped as I can (which is a great reason for following Jason’s advice, because it is right), but if you are one of the types that think what he is saying is not correct, isn’t it good to just avoid that in between cardio anyway to avoid arthritis, cancer, being sick all of the time because of chronic systemic inflammation?
Just another reason to avoid it, it sucks. Honestly. Sprints are fun, walking is nice and refreshing; however, “inbetween” cardio is neither.
27. Sep, 2010
at 3:02 pm #
Thanks for clearing that up. Good to know that your not abandoning sprints. Mainstream interval cardio and steady state cardio sucks balls. I’d rather to do hill sprints or kb throws any day over the normal crap.
27. Sep, 2010
at 3:25 pm #
Those MF’ers are ripped. There is no doubt everyone would rather have a sprinter body over a marathon runner.
27. Sep, 2010
at 4:03 pm #
“Big, strong, explosive…….soccer player?????????”
27. Sep, 2010
at 4:19 pm #
Ha AJ explain please! (Although i think i know what you mean)
27. Sep, 2010
at 5:12 pm #
You hit the nail right on the head. I’m a sports performance coach and a novice powerlifter but I have several friends that are body builders. Most of them are natural and they live on the treadmill when they are contest prepping… They are walking not running. They also may pump up the incline to make it harder but they still walk to lean out. I just can’t see Jay Cutler running sprints! That might actually be a stunt on the new Jackass movie coming out.
Skill position football players, ice hockey players(both in skating and dry land training), and sprinters are all lean and they train exactly how you are recommending.
I hope that the rest of the “fitness” world stops hurting people.
28. Sep, 2010
at 10:19 am #
I agree with Raymond, I must be reading to many fitness blogs. Everyone disagrees and when they sound like they are saying the same thing they are not. SO now intervals is a bad word??? Yet Craig Ballantyne, who endorses Jason Furruggia and his methods, does exactly what Jason is saying not to do. Craig even came out with a DVD series with that exact timed interval, 30sec on, 90sec off, on a treadmill no less. What gives? If 2 people who endorse each other, who are supposedly experts, can’t agree on how to do cardio, then who will?
28. Sep, 2010
at 2:18 pm #
Jay, great post.So common sense, now that I think back on it. But, I was wondering: can I replace early morning fasted walking with ( please don’t laugh your ass of now) fasted TAEBO ( Billy Blanks) or fasted stationary bike ( steady low resistance) ? Thanks in advance
28. Sep, 2010
at 8:13 pm #
Great article Jason. I’ve been following MGS and have been gaining in muscle mass, but have been neglecting cardio in fear of losing my muscle mass that I’ve gained. I was a sprinter in high school, and extremely fast. One of my favorite activities is hiking. My last hike wore me out because I lost my conditioning. I am going to start my hikes again this week, and do it a few times a week to keep me from gaining any fat, and to get my hiking endurance back to where it was. I think I may also add sprinting every other week.
28. Sep, 2010
at 10:08 pm #
@ Michael and Raymond
I think the best idea is to take it into your own hands and decide what is best for you, ive had great results with all different types/combinations/methods of cardio, there is more than one way to eat a reeses. There is a lot of info out there to decipher but bottom line is you have to look at the clients of the experts which is ultimately their product. There are a lot of “fitness” experts out there but most of them have never actually trained anyone or have spent any time under the bar themselves. There are only 4 blogs I follow, this being one of them, because I know the guy writing it knows what he is talking about and his methods get results. The best advice is at some point you just have to try some things and figure it out for yourself
Cheers
29. Sep, 2010
at 6:58 am #
Great info as always from this well respected tattoo, awesome guy. I like how you break it down. I need to join your inner circle thingy, any specials or deals currently?
29. Sep, 2010
at 12:58 pm #
The benefits of interval training, while valid, have been *long* over-hyped (esp on the intrawebs). One thing that has gotten so out of control is stupid are all the ‘tabata’ workouts out there. First of all, just b/c you do 8 x 20/10 doesn’t mean it’s ‘tabata’. 2nd of all, unless you follow the same *exact* prescriptions the folks in the study did, it’s not ‘tabata’. Lastly, anybody that does 8 x 20/10 on exercises like burpees, swings, pullups, or any one of a number of other exercises is just dumb…or a whole variety of reasons.
29. Sep, 2010
at 4:36 pm #
Ok, so my question is- Which would be better for heart health & why? Walking or Sprinting? Thanks for any answers & sorry if it was already answered in a previous post.
01. Oct, 2010
at 11:45 am #
Thank Jesus you dispelled the bulking myth. I am going to send a ton of my fatty meathead friends here to read this.
01. Oct, 2010
at 8:45 pm #
Great info. I do question the short sprints. Sprinters go all out for more than 40m all the time. Sure someone off the street should not jump into high intensity sprints, no matter what the distance.
I am right there with you about the lactic acid. If you are looking to get strong there is no place in your training for the lactic acid build up.
@jp short intervals do improve your heart and cardio and increase you vo2 max. Doing a 6 second sprint takes energy and your aerobic system is used to restore energy stores. Ever listen to sprinter after a 100m race or for that matter a 60m race. They are breathing hard. And a world class guy can run that under 10 seconds.
Sure you need to be sport specific in your training so a sprinter will not have the same ability to run a mile as the distance guy but anyway you want to measure it sprints will improve your heart and lungs.
05. Oct, 2010
at 5:51 am #
Joe- Intervals are good for soccer players.
Julio- I still like the prescription I wrote in MGS
JP- This was not the topic at hand. However, all of the training I recommend strengthens your heart. Short sprints do zero for your cardiovascular system? Have you ever seen a sprinter interviewed at the Olympics following a 100m?
Rick- I couldn’t agree more with your last line.
Michael- That’s a dangerous trap you may be falling into. Better to something than over think everything.
Jason- Haha. I said the same exact thing before I read your answer.
06. Oct, 2010
at 6:21 am #
So cool to read in black and white what I’ve been suspecting for over two years now, that real change happens at the extreme ends of the cardio spectrum, not in the middle. Just stop and observe the folks who spend ages on the cardio machines. Their bodies never change, unless you count their middles slowly getting thicker and their extremities getting smaller. I do shuttle runs on an indoor basketball court and I walk the dog. Both are activities I enjoy.
03. Nov, 2010
at 2:54 pm #
Don’t dis “rowing machine” or the ergo-meter, erg for short, so quickly. I know most fitness “experts” go with more traditional ways of working out and getting fit but the erg is a great tool. I played football in HS and need to keep my weight up as high as possible. I began rowing in college and lost about, 50lbs off the bat doing intense erg training in the fall semester, in about 4 months. I have maintained that weight loss (though I just graduated in May) by continuing to use the erg as a main form of cardio. The thing about the erg, is that most people have absolutely no idea how to use it correctly. I’ve seen so many trainers at the gym get the clients on these machines and show them the complete wrong way to use it. Granted, they are getting paid by the hour so slower results benefit them in a way. With that, people end up getting knee and back injuries that can plague them for an extremely long time. Doing intervals on the erg is a pretty great work out, I’ve actually developed more muscle definition and fat loss because of that, than any other sort of cardio. The key to the erg is proper usage and to know which workouts are useful on the erg. The only way i ever learned this was through rowing collegiately, which is the hard part about it. But with that, rowing, and using ergs, is something that people can do for a lifetime, if using the proper technique. Just check out the average age of non-collegiate rowing clubs in the country, its probably closer to Grandpa’s age.
04. Apr, 2012
at 1:03 pm #
Awesome words of wisdom Big J!
04. Apr, 2012
at 6:06 pm #
Hey Jason,
It’s been a long time since I’ve seen you back in NJ. I hope things are going well. I loved the article and I think I’m definitely going to get back into this routine. However, I do have a few questions. I’m trying to pick up boxing and I realized (more like always knew, but was hoping it wouldn’t be a problem) that I don’t have much in the way of stamina. I understand that boxing is almost like wrestling in the sense that while endurance is needed, it’s almost like every time you throw a punch, duck, dodge, or move around you need to have some speed and fast twitch muscle training/endurance/strength. I am very new to the sport so there is a chance that some of the things I brought up may be wrong, but in any case, I feel that I would like to initially increase my long distance stamina, and then increase my fast twitch muscles and speed. The boxing coaches at the gym I go to say that running is the best way to improve yourself, but I’m concerned that just running for as long as I can might reduce my fast twitch muscles in my legs and possibly other places in my body. Would you not recommend running? Would just walking or sprints help improve my endurance enough in the boxing gym? Also, as a more related note to this article, I’ve heard that swimming is one of the best ways to burn fat, but not at first if you haven’t swam in a while since you are most likely burning a lot of carbs or muscle just trying to stay afloat and build endurance. Would you recommend swimming at all as a low intensity cardio workout? I know I through a lot out there for you and that this post may be a little late in timing. Please feel free to answer me whenever you have the chance. Thanks.
04. Apr, 2012
at 9:26 pm #
Check out this article, scientifically lactic acid is not the problem, it is fuel. http://www.nytimes.com/2006/05/16/health/nutrition/16run.html?_r=1
13. May, 2012
at 7:46 am #
After reading this article, im on my way to do some research about the lactic acid build up from cardio. Ive been doing intense cardio. anywhere from 10-25 minutes of jump rope with a minute or 2 of rest in between these sessions. When I run on the treadmill i do high intense for 2-3 minutes and rest do slow walking for a minute then back to high intense, and these sessions last anywhere from 10-30 minutes. I do steps, a flight of 153 steps and I maybe rest for 20-30 seconds when i need to which is about 2-3 times a session that usually lasts for 20 minutes, going up and down the stairs around 10 times including up and down. I do half an hour boxing sessions with minimal rests in between. I havent lost a whole lot of muscle and alot of fat. I wanted to share this and see some responses as im concerned after reading this post. Any feedback is welcome, thanks.
13. May, 2012
at 11:30 am #
Thanks Jason I have been doing hill sprints for a few months now and was wondering if I was doing them right …length, time, rest ect. thanks for clearing that up !!!
13. May, 2012
at 12:33 pm #
What do you recommend for someone (myself) who is physically active and strong… but suffering from Plantar Fasciitis? I cannot run … or even walk very far before it hurts like the dickens and then I have to lay off everything except Kettle bells and weight training for about a week. I’ve been riding my bicycle…. doing “intervals”…. outside… really fast…. then back off… repeat, repeat, repeat…. I’d love to hear your thoughts.
13. May, 2012
at 1:30 pm #
Fantastic article! Glad I’m doing something right…:-)
14. May, 2012
at 10:14 am #
This article makes me think your trying to appeal towards 10 year olds. I mean that in the nicest possible way but plenty of people can sprint for 30 seconds, of course their version of “sprinting” might be different from someone else’s but nonetheless a 30 second sprint is no where near as taxing on the body as you are articulating in your article.
Since you are speaking about muscle loss I assume your preaching to the mildy in-shape demographic, and they should be fine completing those times… It’s the rest that should be lengthened/shortened as needed, not the sprint duration/intensity.. Hard as you can, x amount of times, supplement rest as needed.
14. May, 2012
at 7:55 pm #
Awesome article. I’ve been crossfiting for 3 years now and I miss the low intensity training… I’m going to start adding 30 min of walking 3 times a week and a sprint day once a week ;)
28. May, 2012
at 8:21 pm #
Absolutely hilarious. Great information and very well said.
24. Nov, 2012
at 10:09 am #
I think that everyone should firstly lose fat and after that to gain muscle.There are many advantages here.You are right, cardio high-intensity and low-intensity are very useful.I prefer sometimes high-intensity instead of the other one.
09. Jan, 2013
at 3:46 am #
Your method of describing the whole thing in this article is in
fact fastidious, all can effortlessly know it, Thanks a lot.
18. Jan, 2013
at 5:14 am #
Hi i really enjoyed this article but can i just say that alot of times in sports like soccer you actually need to jog does that mean im getting alot of negatives to my muscles and should not play it?