Brief Workouts Produce Significant Strength Gains

by P.D. Mangan
From The, October 2016

Brief Workouts Produce Significant Strength Gains

Strength training is one of the most efficient, healthiest, and anti-aging of all exercises. Virtually everyone should be training for strength. Many people have the mistaken idea that they must spend long hours in the gym to build up muscle and strength, and this belief stops them from beginning a strength-training program. What if that belief is completely mistaken? One of the main differences and points of contention in weight lifting is frequency and duration of workouts. We’ll see in this article how brief workouts produce significant strength gains. How often should you train for strength? Bodybuilders, gyms, and most publications devoted to it advocate that you train often, as frequently as five times a week. Is this necessary, and is this optimal?

The fitness industry has an obvious conflict of interest here: they want you to use their products as much as possible in order for them to earn more money. If you are told to work out more often, you will be more likely to renew your gym membership, buy more supplements and equipment and magazines, and just generally to order your life so it revolves around weight lifting and fitness.

Others, more scientifically oriented, claim that you don’t need to train as often to maximize muscle gains, nor that you need to do more than one set of each exercise. In the very informative book, Body by Science, Doug McGuff, M.D. advocates brief, once weekly workouts, a far cry from the three to five a week often advocated elsewhere. McGuff bases his recommendation on a number of things, most importantly the speed at which muscle recovers and grows from an intense workout, which is much slower than most people think. I previously touched on the issue of workout frequency in my article on high-intensity training.


A Real-World Test Of Brief, Infrequent Workouts

Another aspect of infrequent workouts is that most people (normal people) are uninterested in spending hours a week in the gym. Indeed, getting normal people to exercise at all, much less lift weights, is a challenge. Older people especially need strength training, since they lose muscle with age. Getting these people into the gym can greatly improve their health. If older and or normal people, and by “normal” I mean those not interested in bodybuilding, (because, face it, we bodybuilders are a little weird) can gain strength and obtain health benefits with minimal gym time, that would be a breakthrough. So a study was undertaken to see whether they could: “Strength Gains as a Result of Brief, Infrequent Resistance Exercise in Older Adults”.

The lead author is James Fisher (1), a British exercise scientist who’s done lots of interesting work. In the study, 14 men and 19 women, average age 55, worked out for 12 weeks. The sessions were very brief at less than 15 minutes each, and they were infrequent, at twice a week. The participants did a routine essentially the same as advocated in Body by Science, consisting of: pull down, chest press, seated row, overhead press and leg press.

In addition: all work was done on machines, another plus for getting real people to do resistance training; each exercise was done for one set to failure; each exercise was done using super slow rep cadence--10 seconds up, 10 seconds down; as strength was gained during the study, weight was added to each exercise (the principle of progression); each participant was encouraged to move to the next exercise quickly, generally in less than 30 seconds.

This is almost exactly like the Body by Science program, with the exception that the book recommends once weekly training, and in the study, training was twice weekly. (Some nuance: Body by Science recommends that trained people workout once weekly, and the study used untrained people.)

The results, in terms of strength gains relative to body mass, are shown below:

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For a total time commitment of 30 minutes a week, these older adults showed large and significant strength gains, as much as 55% more than when they started. Undoubtedly if they continued the program longer, they would continue to gain in strength. Among other things, this study showed that intensity of effort is very important for gains.

The authors comment: “The data herein represents “real people, doing real resistance exercise” from which they are intending to acquire the aforementioned health and fitness benefits…Previous research suggests that perceived difficulty and misinformation about expected outcomes are barriers to older persons performing resistance exercise. This study presents data from a UK based exercise facility where sessions are performed on a 1 : 1 basis (client : trainer). The study shows that resistance training need not be time consuming, dauntingly complex, or overly difficult, and that considerable increases in strength can be achieved.” [My emphasis.]



This study shows that brief, infrequent workouts produce significant and substantial gains in strength in older adults. Highly frequent and long workouts are not necessary, and telling people that they are may result in many fewer people taking up strength training.

(1.) Fisher, James, et al. “Strength gains as a result of brief, infrequent resistance exercise in older adults.” Journal of Sports Medicine (2014)