Is once a week strength training enough?
For the goals most adults over 50 are actually training for - strength, bone density, joint stability, day-to-day function - one properly executed session a week is enough. The qualifier matters. Each session has to be genuinely high in effort, slow, and supervised. This article walks through what the published research says, where the limits of once-weekly sit honestly, and what a single 45-minute session looks like on our floor.
The short answer, with the asterisk
For the strength, bone-density, joint-stability and functional-capacity picture most of our clients are actually training for, the published evidence supports once-weekly resistance training as sufficient. The conditions are not negotiable. The session has to be genuinely high in effort, supervised, performed at a slow controlled cadence, and taken to the point where one well-executed set draws the full training stimulus from the muscle.
The asterisk: this is not the right protocol for everyone. A 25-year-old physique competitor chasing maximum hypertrophy, a rugby player in a sport-specific peak strength block, anyone whose goal is the maximum possible muscle size in the shortest possible window - they will get more from training more often. The honest framing is not "once a week is best for everyone." It is "once a week, done properly, is enough for the goals the typical reader actually has."
What the research actually says about frequency
The protocol behind our floor is High Intensity Training (HIT) - a slow, controlled, one-to-one strength protocol, distinct from HIIT (High Intensity Interval Training). The research on how often that kind of work needs to happen has refined its answer over the last decade.
The most useful finding: when total weekly working sets are held constant, training frequency has no meaningful effect on hypertrophy. A 2019 systematic review and meta-analysis by Schoenfeld, Grgic and Krieger found that the lever doing the work is total volume, not how that volume is distributed across the week. An earlier 2016 review read as favouring twice a week; the 2019 update attributed that signal to volume confounding rather than frequency itself.
For older adults specifically, the load-bearing study is DiFrancisco-Donoghue and colleagues, British Journal of Sports Medicine, 2007. Their small randomised trial in 65 to 79-year-olds concluded: "One set of exercises performed once weekly to muscle fatigue improved strength as well as twice a week in the older adult." Sample size was small (n=18); we are not calling it the final word, but it describes our population precisely. A 2024 randomised controlled trial in Scientific Reports found the same pattern in older adults using eccentric loading over twelve weeks. Fisher and colleagues (2014), working with adults averaging 55 years on the ten-second-up, ten-second-down cadence we use, recorded large effect sizes for strength gains across the major lifts in a previously untrained population.
The honest counterweight: the American College of Sports Medicine's 2026 Resistance Training Position Stand recommends at least two sessions per week as the general adult minimum. The guideline floor is two, not one. The reconciliation is that the once-weekly evidence above describes a different protocol - true high effort, supervised, slow cadence to controlled failure - where the equivalent stimulus is compressed into one session. When you change the dose, you change the frequency it makes sense to deliver at.
Why a high-effort session needs more recovery
A session of three sets with two reps in reserve is not the same dose as a single set taken to controlled failure. The recovery requirement is different because the stimulus is different.
A single bout of resistance exercise taken to true high effort elevates muscle protein synthesis for somewhere between 24 and 72 hours, with the longer window seen in trained individuals. The literature is messier than the round numbers suggest, and we are not going to pretend the timing is precise. The directional point holds: a properly executed session earns more recovery than a submaximal one, and six to seven clear days between sessions sits comfortably inside that envelope. It is not the only legitimate way to organise resistance training. It is what makes one careful session a week a complete dose for our population.
“The question is not whether more would do more. It is whether what once a week, done properly, gives you is enough for the life you are actually trying to live. For most of our clients, the answer has been yes for many years.”
Yoram Sher, Director and head coach
Who once a week is right for, and who it isn't
Once a week is the right setting for adults training for strength, day-to-day function, bone density, joint stability, back rehabilitation, longevity, or return from surgery. If the goal is to remain capable in the body you have, year on year, one careful session does the job.
It is not the right setting, or not the only setting, for competitive physique athletes, anyone in a sport-specific peak strength block, or anyone whose sport demands repeated maximal exposure week in and week out. Those readers will get more from training more often, and we will say so directly. They are not wrong to train more. They are training for different outcomes.
Some of our own clients step up to twice a week for a defined period - training intensively toward a procedure, an event, or an accelerated rehabilitation timeline. That is in our approach too. Once a week is a sensible default, not a rule.
What "enough" actually means
"Enough" has two answers, depending on what you are training for.
Enough to maximise hypertrophy points to higher frequencies, more total volume, longer sessions. Enough to build and hold strength, support bone remodelling, protect joints and keep day-to-day capability is a different answer, and it is what most readers searching this question are after. Once-weekly resistance training, done properly, supports that second picture. The benefit categories themselves are covered in detail on the benefits of strength training, especially over 50 .
Resistance training at any frequency from once a week upward is associated with lower all-cause mortality and better metabolic, cardiovascular and bone-health outcomes than not training at all. The question is being asked against a baseline of zero, not against an optimised-hypertrophy ceiling. Once a week sustained for years comfortably beats twice a week sustained for six months.
What this looks like at Ultimate Strength
One 45-minute session a week, by appointment, in a private studio in East Finchley, North London (N2). Six to eight exercises covering the major muscle groups, the trunk and the lower spine. Each repetition is ten seconds up and ten seconds down, no momentum, full anatomical range. The set continues to controlled failure, typically 90 to 120 seconds per exercise. Yoram Sher , Kieser-trained, stands next to you for the whole session. Every weight and repetition count is recorded by hand and used to calibrate the following week.
That is the dose the once-weekly evidence describes. It is not a lighter version of a conventional gym programme; it is a different protocol that earns the gap between sessions. The wider method sits on our approach .