Why strength training matters more after 40
Muscle mass and strength decline with age, and the loss speeds up if the week is only cardio. Strength training is how you load muscle and bone after 40, starting from what you can do now. James Bowen builds that work into personal training or small group classes at Adapt in North Sydney. Written on 16 June 2026.
Why muscle and strength change after 40
Sarcopenia is the age-related loss of muscle strength and mass. It is common with ageing, and it can be slowed when resistance training is part of the week. Hormones that support muscle protein synthesis decline through the thirties and forties, older muscle responds less easily to the same session, and many people move less across the day even if they still run or cycle.
Cardio has its own place. It does not load skeletal muscle the way progressive lifting does, so a week of walking or cycling alone leaves a gap that shows up as weaker lifts, slower stairs and less reserve when you are unwell.
How much muscle people lose without strength training
Reviews often describe a loss of about 3 to 8 percent of muscle mass per decade after 30 when resistance training is absent, with a faster drop later in life. Those figures are population patterns, not a prediction for you. Lower muscle and weaker legs are linked with falls, slower recovery from illness and less capacity for daily tasks.
Adults can still build strength at 40, 50 and 60 when load starts from current capacity and recovery is given enough room. The programming changes; the work does not become optional if you want to keep that capacity.
What changes in training after 40
The lifts can stay familiar. Recovery, protein and how fast load climbs usually need more attention than they did in your twenties.
| Under 30 | After 40 | |
|---|---|---|
| Recovery between hard sessions | Often 24 to 48 hours for the same muscle group | Often longer, with more difference between people |
| How hard each week is | High intensity can be repeated more often | Intensity still matters, and recovery between hard days matters more |
| Warm-up | Shorter preparation can still feel enough | Joints and tissues usually need more time before working sets |
| Injury history | Fewer accumulated niggles for many people | Load is planned around old injuries, with physio input when needed |
How often to strength train after 40
Australia's physical activity guidelines recommend muscle-strengthening activity on two or more days a week. Full-body sessions or simple upper and lower splits are often easier to recover from than high-frequency body-part splits. Compound patterns such as squat, hinge, press and row give you the most work for the time you have, and load needs to climb as you adapt.
At Adapt, group classes follow programmed blocks, and personal training starts with how you move now. If an old back or shoulder problem needs a clinical look first, a physiotherapist can set what to adjust before the coach writes the block.
Strength training for women and men after 40
For many women, the perimenopause and menopause years add a faster drop in oestrogen, which is involved in muscle and bone. Resistance training with progressive load is used in that period to train both. It does not require maximal lifting from day one; it requires a plan you can repeat.
For many men, testosterone declines gradually from around 30. Strength training is still the stimulus that builds and keeps muscle. High-intensity intervals and cardio support health and they do not replace progressive resistance work. Consistent sessions at a load you can recover from beat rare all-out weeks.
Where to start if you have not lifted in years
Start with an assessment of how you move and what you can load now, especially if you have a history of back, knee or shoulder pain. Learn squat, hinge, press and row patterns at a moderate load. Two sessions a week you actually complete will do more than a short burst of daily training you cannot keep.
Current options and fees are confirmed before you start on the personal training and membership pages. Training is not claimable on private health.
Questions about strength training after 40
Talk to a coachWill strength training make me bulky after 40?
Unlikely. Adding a large amount of muscle takes years of progressive training and a sustained calorie surplus. For most people after 40 the practical task is gaining and keeping muscle, not accidentally gaining too much. Your coach sets load and volume from your starting point.
Should I train full body or split sessions after 40?
Full-body sessions or a simple upper and lower split are often easier to recover from than a high-frequency body-part split. Two to four strength days a week is a common range. Your coach chooses the split from your week, your recovery and any injury history.
Can I start strength training with back pain or an old injury?
Often, once someone has looked at how you move. A physiotherapist at Adapt can set what to avoid or adjust, and your coach works from that plan. Do not start a heavy program from a generic template if the area is currently irritable.
What does an accredited strength and conditioning coach do at Adapt?
James Bowen is an Accredited Strength and Conditioning Coach. That means formal education and practical training in strength and conditioning, with registration through the ASCA professional body. He leads training at Adapt and coordinates with the physiotherapy team when a program needs to reflect current clinical guidance.