How to Build Muscle After 60: What the Trials Show

Can you build muscle after 60?

Yes. Adults over 60 have gained measurable muscle and strength in randomized trials, including people in their 70s, 80s and 90s.

The table lists the main studies, with who was in them and what was measured. Percent changes are the trial’s own figures. Where a row says “not in abstract”, the number exists in the paper but was not in the part I read.

Study	Who	Weeks	Strength	Muscle
Frontera, 1988	12 healthy untrained men, 60 to 72	12	Knee extensors +107.4% (1RM)	Quadriceps area +9.3%, total muscle area +11.4% (CT)
Fiatarone, 1994	100 nursing home residents, mean age 87	10	+113% vs +3% for non-exercisers	Thigh muscle area +2.7% vs -1.8% (P = 0.11, not significant)
Kosek, 2006	25 adults, 60 to 75	16	Not in abstract	Type II fiber size +23%
Leenders, 2013	24 women and 29 men, about 70	24	Leg extension +42% to 43%	Leg lean mass +3%, quadriceps area +9%
Peterson, 2011	49 studies, 1,328 adults 50+	varied	Not measured	Lean mass +1.1 kg (95% CI 0.9 to 1.2)
Borde, 2015	25 trials, mean age 65+	varied	Effect size 1.57	Effect size 0.42 (9 studies)
Grgic, 2020	22 trials, age 75+	varied	Effect size 0.97	Whole-muscle effect size 0.30

What this does not tell you: Frontera’s group was 12 men. Fiatarone’s muscle-size change was not statistically significant. Peterson’s pooled result was highly variable between studies (I² 84%). Borde’s authors rated the overall study quality as poor (mean PEDro score 4.6) and called their muscle-size findings preliminary.

Does age change how much muscle you build?

Yes, a little. In the Peterson meta-analysis, older participants gained less lean mass than younger ones, and higher-volume programs gained more.

The meta-regression found that older age predicted a smaller gain (P = 0.01) and higher volume a larger one (P < 0.01). The authors concluded that resistance exercise works in aging adults and that starting earlier may work better. The practical reading is that the gains are smaller at 80 than at 60, and still present. Kosek’s 16-week trial showed the same pattern: adults aged 60 to 75 grew type II fibers by 23%, against 32% in adults aged 20 to 35.

Can you build muscle after 70?

Yes. Adults averaging 70 gained muscle and strength in a 24-week trial, and trials in people 75 and over show the same direction.

Leenders and colleagues trained 53 healthy adults three times a week for 6 months. Grgic’s review of 22 randomized trials in people 75 and over found a significant effect on strength and on whole-muscle size, with minimal reports of adverse events. Its authors found no significant effect on handgrip strength or on muscle fiber size, so the gains were not uniform across every measure. The oldest participants, in Fiatarone’s trial, averaged 87 and lived in nursing homes. Of the 100 residents, 94% completed the 10-week study, and strength rose 113% in those who trained.

How long does it take to build muscle after 60?

Strength rises within weeks, and trials measured muscle size changes at 12 to 24 weeks. No trial here gives a single “rate” that applies to everyone.

The checkpoints below come from the studies, not from one program. Different groups, tests and training plans mean the rows cannot be joined into a curve.

Checkpoint	What a trial measured
Week 0	Baseline strength and muscle size
Weeks 1 to 12	Frontera tested 1RM weekly in 12 men aged 60 to 72 and saw a progressive increase
Week 10	Fiatarone: strength +113% in nursing home residents averaging 87
Week 12	Frontera: knee extensors +107.4%, quadriceps area +9.3%, 3 sets of 8 reps at 80% of 1RM, 3 days a week
Week 16	Kosek: type II fiber size +23% in adults aged 60 to 75, 3 days a week
Week 24	Leenders: leg lean mass +3%, quadriceps area +9%, strength +42% to 43%

A worked example shows how to read a percentage. Say your first leg-extension set is 20 kg (44 lb). A 107% rise would take that to about 41.5 kg (91 lb). A 42% rise would take it to 28.4 kg (63 lb). Strength gains ran well ahead of muscle-size gains in every row of the table. The abstracts do not say how much of the strength gain came from muscle and how much from other adaptations.

For lean mass, 1.1 kg (Peterson) is about 1.8% of the body weight of a 60 kg adult and 1.4% of an 80 kg adult. Those are arithmetic on a pooled average, not a prediction for you.

What is the best way to build muscle after 60?

The best-supported way is progressive resistance training at least 2 days a week, plus enough protein. The trials do not agree on one ideal program.

The CDC (page dated 4 December 2025) says adults 65 and over should strengthen muscles on at least 2 days a week, using 8 to 12 repetitions per activity, with 1 set as a minimum and 2 or 3 sets for more benefit. Borde’s dose-response review found the largest strength effects at 2 sessions a week, 2 to 3 sets per exercise, 7 to 9 repetitions per set and intensities of 70% to 79% of 1RM. Its authors warned that the studies were low quality and that it could not test how these variables interact. Frontera’s men trained at 80% of 1RM, 3 sets of 8, 3 days a week.

If you are new to lifting, the first 4 weeks plan for women over 50 shows a gradual start with sets, reps and reps in reserve. Men and women responded similarly in Leenders’ trial, so the same logic applies to both.

How much protein do you need to build muscle after 60?

The PROT-AGE group recommends at least 1.0 to 1.2 g of protein per kg of body weight a day for adults over 65, and at least 1.2 g per kg for those who exercise.

For older adults with acute or chronic disease, PROT-AGE advises 1.2 to 1.5 g per kg a day. People with severe kidney disease (eGFR below 30, not on dialysis) are an exception and may need to limit protein. The calculation below applies those figures to two body weights. The per-meal column is simple division by three meals, which I did myself. It is not a guideline.

	60 kg (132 lb)	80 kg (176 lb)
Daily, 1.0 to 1.2 g per kg	60 to 72 g	80 to 96 g
Daily, exercising (1.2 g per kg or more)	72 g or more	96 g or more
Daily, with disease (1.2 to 1.5 g per kg)	72 to 90 g	96 to 120 g
Per meal at 1.2 g per kg, 3 meals	24 g	32 g
Per meal at 1.5 g per kg, 3 meals	30 g	40 g
Ceiling where extra stopped helping (1.62 g per kg)	97 g	130 g

The last row comes from Morton’s meta-analysis of 49 trials in healthy adults, where total protein above about 1.6 g per kg a day gave no further gain in fat-free mass. It included adults of all ages. The same analysis found that protein supplementation added only 0.30 kg of fat-free mass to training, and that the benefit shrank with age.

Protein supplements alone did not raise muscle mass in the frail. In Tieland’s trial, 65 frail older adults took 15 g of protein or a placebo at breakfast and lunch for 24 weeks, and muscle mass did not change in either group. Physical performance did improve. Fiatarone’s trial found no effect from a multinutrient drink either.

Your next step is to ask a doctor or dietitian whether these totals suit your kidneys and any medication. Then divide your daily number by the meals you eat.

What the evidence leaves open

Most of the trials are small, short and in healthy volunteers who agreed to train. Pooled results mix very different programs. Muscle size was measured by CT, DXA or biopsy depending on the study, so percentages do not line up. None of this applies to a person with an acute illness, a recent fracture or uncontrolled heart disease. A physiotherapist or doctor should set the starting load in those cases. For the broader picture of lifting in this age group, see the Lift Over 50 guides.