How often and how hard should I strength train?
Start with 2 to 3 training days per week, sets of 8 to 12 repetitions close to your maximum, and increase the weight as soon as you can add extra repetitions. This approach demonstrably builds both strength and muscle mass at every level.
If you are just starting out, stick to 2 to 3 days per week. Train sets of 8 to 12 repetitions at a weight you can just barely complete, meaning close to your maximum. These are the guidelines of the American College of Sports Medicine1 and they are well supported by evidence.
As you gain more experience, you can increase the frequency. After about six months of consistent training, 3 to 4 days per week fits well. If you have several years of experience, you can move up to 4 to 5 days. At that level it also pays to periodically go heavier: sets of 1 to 6 repetitions with more weight build additional strength1.
The core principle for lasting progress is progressive overload. Can you do 1 to 2 more repetitions than your target? Then increase the weight by 2 to 10 percent. Without this gradual build-up, both your strength and muscle development will stall, at every level1.
For strength development the evidence is fairly consistent: more sets and more weight lead to more strength. For muscle mass the picture is somewhat less clear-cut. Not all review studies found a strong independent effect of intensity or frequency2. If your goal is purely to get stronger, training heavier is the best-supported approach. If you also want muscle mass, how well you manage total volume matters just as much.
Start each session with large muscle groups and multi-joint exercises such as squats and bench press before targeting smaller muscles. The evidence for this is limited but consistent1,2. Advanced techniques such as drop sets or supersets can be useful when you want to break through a plateau. They are time-efficient and may provide an additional growth stimulus, but the research is too limited for precise guidelines3. For beginners they are not a suitable foundation.
Two core sources: a guideline document from the ACSM (PMID 19204579, strong evidence) and a broad review study of training parameters (PMID 37385345, moderate evidence). Supplemented by a review study on advanced techniques (PMID 31817252, limited evidence). A total of 3 unique sources, of which 1 is an umbrella review (PMID 37385345).
Is walking enough, or do I really need to do strength training too?
Walking alone is not sufficient to stop muscle loss or to meaningfully reduce the risk of falling. Add strength training twice a week to your routine for clearly measurable additional benefits.
Does strength training help with healthy ageing?
Strength training is one of the best-supported interventions for healthy ageing: training two to three times per week with progressive resistance demonstrably improves muscle strength, mobility and independence, even at an advanced age.
How much cardio do I really need per week?
For a healthy adult, 150 minutes of moderate cardio per week is the well-supported minimum, supplemented by two strength-training sessions; if you want to maintain your weight, you are better off aiming for 225-420 minutes per week.
Is strength training still safe and worthwhile after the age of 70?
Strength training after 70 is both safe and worthwhile: the evidence for greater muscle strength and reduced fall risk is strong, and even short, light sessions already produce measurable results. When training heavily, it is worth keeping an eye on the potential impact on your blood vessels; blood flow-restricted training with light weights is then a well-supported alternative.
How much exercise do I need to live longer?
The biggest health gain comes from just a little exercise. Going from nothing to 150 minutes per week gives a 31% lower risk of premature death; after that the benefit increases somewhat more, but levels off.
How many steps should I take per day?
More steps is better for your health, but even 2,500 steps per day already yields measurable benefit. Aim preferably for 7,000 to 10,000 steps, depending on your age, and walk briskly for part of the day.