What Is The Optimal Time Between Sets For Muscle Growth?
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What Is The Optimal Time Between Sets For Muscle Growth?
What Is The Optimal Time Between Sets For Muscle
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Topic Of The Week
August 29, 2017 5 min read
What Is The Optimal Time Between Sets For Muscle Growth
The Question: How long should you wait between sets? Should you try to spend only a few seconds
between sets to fully work the muscle and increase the "burn", or should you wait longer until your
muscles have fully recovered from the last set?
Which way is best to increase growth? Should you ever change the amount of time between sets over
time, or stick to one, proven method?
Bonus Question: Have you ever used one of those "intense" workouts with absolutely minimal amount
of time between sets just to try to break a plateau or try something different? Something like doing 10
sets of squats with only 15 seconds between sets, until you are on the verge of puking? If so, what was
the workout exactly? How often should you do it? Did it help your overall gains?
1. ~jAmeZ~ View Profile
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1st Place JAMEZ
How Much Rest Is Best?
The "best" amount of time to rest between sets, like most things in bodybuilding, depends on what
specific goal you're training for.
Do you want to be stronger, more muscular or increase your stamina? Common sense and research
tells us that we can only pursue one goal at a time.
If we want to be stronger, we should follow a training program that increases our strength as quickly as
possible. Likewise for size and stamina. Not surprisingly, with each specialized program comes a
different requirement for rest periods.
Let's look at WHAT those different rest periods are and, most importantly, explore WHY they are.
To get stronger faster, the best rest period is 3 to 5 minutes between sets.
This is because much of the energy your body consumes during traditional strength training (heavy
weight, 1 to 6 reps) comes from the Adenosine Triphosphate Phosphocreatine system. The ATP-PC
system uses phosphagens to produce energy very quickly and without the use of oxygen. Your body
has a very small phosphagen reserve, which lasts about 15 seconds. It takes your body about 3
minutes to fully replenish phosphagen stores (Fleck, 1983).
In other words, if you give your ATP-PC system at least 3 minutes to recharge, you'll lift more weight
and get stronger faster.
In one study, athletes lifted a weight more times in 3 sets after resting 3 minutes compared to when
they rested only 1 minute (Kraemer, 1997). Another study showed a 7% increase in squat strength after
5 weeks of training with 3 minute rest periods.
The group that rested for 30 seconds only improved their squat by 2% (Robinson et al, 1995). Two
more studies that examined very short rest periods (30 to 40 seconds) found they caused nowhere
near the strength gains from longer rest periods (Kraemer et al, 1987; Kraemer, 1997).
You'll cool down too much if you rest longer than 5 minutes. No-one wants to increase their chances
Learn More About Strength Training
To get bigger quicker, the best rest period is 1 to 2 minutes between sets.
Typical bodybuilding/hypertrophy training (moderate-heavy weight, 6-12 reps) draws energy from the
ATP-PC and glycolytic system (the glycolytic system gets most of its energy from the carbs you eat).
The aerobic metabolism plays a very small part as well.
Think of the ATP-PC system as a racehorse and the glycolytic system as a steady, dependable
Clydesdale. Because your glycolytic system has come to the party, your body doesn't need to rest as
long between sets as when you're strength training.
Bodybuilders take advantage of shorter rest periods to make their muscles BIGGER. How? Well, one of
the key factors in how much muscles grow is the amount of anabolic hormones your body produces
after weight training (McCall et al, 1999). Short rest periods of between 1 and 2 minutes cause a greater
release of these hormones than longer rest periods (Kraemer et al, 1991; Kraemer et al, 1990).
Short rest periods also cause other muscle-building bonuses like increased lactate production and
blood flow to the targeted muscles (Kraemer, 1997; Kraemer et al, 1987). Don't laugh about the blood
flow bit. I know it sounds like old-school "pump" talk. But it's been shown that the increased blood flow
to your muscles helps the protein get there quicker (Biolo et al, 1995).
Muscle fatigue, caused by lactate production, has also been implicated in short-term strength gains
and significant hypertrophy (Rooney et al, 1994).
Learn More About Hypertrophy Training
To increase muscular endurance as quickly as possible, the best rest period is 45 seconds to 2
minutes between sets.
Classic endurance training (light-moderate weight, 15-20 reps) draws much of its energy from aerobic
metabolism. This means your body burns carbs and fats in the presence of oxygen.
Basically, endurance training is aimed at making your muscles more resistant to fatigue. Without going
into complicated details, a major cause of fatigue in endurance activities is lactic acid build-up.
Regularly lifting weights in a 15-20RM makes your body more efficient at clearing lactic acid from the
muscles by boosting your body's hormonal and vascular systems (Donovan & Brooks, 1983).
Coaches from a variety of endurance-related sports usually recommend a 1:1 or 1:2 work-rest interval to
increase your body's lactate threshold (Sleamaker & Browning, Winbourne, 1998, Horswill, 1992). A
strict set of 15 to 20 reps should take you between 45 seconds and 1 minute to complete… which
works out to a rest period of between 45 seconds and 2 minutes.
And here's a final interesting fact: bodybuilders (who train with short rest periods and high reps) are
more fatigue-resistant than powerlifters (long rest, low reps)(Kraemer, 1987). Bodybuilders are better at
clearing lactic acid.
Learn More About Endurance Training
I've done a number of things over the years to crank up training intensity. Strips sets, endurance
training…all things that require you to rest for short periods of time (or not rest at all!).
But the most intense "short rest" workout I've ever done was Bahlow Circuit Training… I almost barfed.
And let's not forget....barfing is actually a BAD thing and not something you ever want to do after a
BCT is not for the faint hearted. It requires bucketloads of protein and many hours of sleep afterwards.
I did BCT for six weeks and made newbie-like gains… but it's hard, hard work.
BCT is basically a giant circuit of supersets. Make that super-supersets. You have three exercises per
bodypart that you do in a row without rest. The exercises start hard and end with an "easier"
movement. Here's an example using the leg superset:
Squats x 10 SL Deadlift x 10 Leg Press x 10
You work out your 10RM on each exercise BEFORE you do the circuit. That's bad. Because by the time
you've done squats and deadlifts without a break, your 10RM on leg press feels like a 5 rep max. And
you're expected to crank out 10.
Bodyparts worked are legs, chest, back, shoulders and arms. You get a two minute rest between each
megaset. TWO MINUTES!!. You do 3 circuits.
First time I did BCT I was on the floor afterwards. Looking at the bright lights. It's the closest I have ever
come to barfing after a workout.
1. Biolo, G et al. Increased rates of muscle protein turnover and amino acid transport after resistance
exercise in humans. Am. J. Physiol. 268: E514-E520, 1995
2. Donovan, C and G Brooks. Endurance training affects lactate clearance, not lactate production.
Am. J. Physiol. 244: E83-E92, 1983.
3. Fleck, S. Bridging the gap: interval training physiological basis. NSCA J. 5: 40, 57-62, 1983.
4. Horswill, C.A. Interval training for wrestlers. Wrestling USA, Sept. 15, 1992
5. Kraemer, W. A series of studies-the physiological basis for strength training in American football:
fact over philosophy. J. Strength Cond. Res. 11:131-142, 1997.
6. Kraemer, W et al. Endogenous anabolic hormonal and growth factor responses to heavy
resistance exercise in males and females. Int. J. Sports Med. 12:228-235, 1991.
7. Kraemer, W et al. Hormonal and growth factor responses to heavy resistance exercise protocols.
J. Appl. Physiol. 69:1442-1450, 1990.
8. Kraemer, W et al. Physiologic responses to heavy-resistance exercise with very short rest periods.
Int. J. Sports Med. 8:247-252, 1987.
9. McCall, G et al. Acute and chronic hormonal responses to resistance training designed to promote
muscle hypertrophy. Can. J. Appl. Physiol. 24:96-107, 1999.
10. Robinson, J et al. Effects of different weight training exercise/rest intervals on strength, power,
and high intensity exercise endurance. J. Strength Cond. Res. 9:216-221, 1995.
11. Sleamaker, R and R Browning. Serious Training for Endurance Athletes. 2nd ed. Human Kinetics,
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