A complete exercise routine includes three types of training: cardio, strength, and flexibility. The World Health Organization recommends at least 150 to 300 minutes of moderate-intensity aerobic activity per week, plus strength training on two or more days. That’s the baseline for substantial health benefits, but the specifics of what you actually do during those sessions matter.
Cardio: Pick What You’ll Actually Do
Moderate-intensity cardio means your heart rate sits between 50% and 70% of your maximum (roughly 220 minus your age). At this level, you can hold a conversation but not sing. Brisk walking, cycling on flat ground, swimming laps at a casual pace, and dancing all qualify. Vigorous intensity pushes you to 70% to 85% of your max heart rate, where talking becomes difficult. Running, cycling uphill, rowing hard, and playing sports like basketball or soccer fall into this zone.
You can mix and match. A minute of vigorous activity counts roughly as two minutes of moderate activity, so 30 minutes of running replaces an hour of walking. If you’re short on time, high-intensity interval training (HIIT) delivers comparable or even superior improvements in cardiovascular fitness with a smaller time commitment. HIIT alternates short bursts at 80% to 100% of your peak heart rate with rest periods. Research shows it’s particularly effective at improving how your body handles blood sugar, outperforming steady-state cardio on insulin sensitivity.
If you sit for most of your day, daily step count offers a useful secondary target. Mortality risk drops steadily as you walk more, then plateaus around 8,000 to 10,000 steps per day for adults under 60 and around 6,000 to 8,000 steps for those over 60. You don’t need to hit 10,000 steps to benefit, but getting close to those thresholds captures most of the longevity gains.
Strength Training: What to Do and How Often
Strength training is not optional. The WHO guidelines specifically call for muscle-strengthening activities involving all major muscle groups on two or more days per week. This means your legs, hips, back, chest, shoulders, arms, and core all need work. You can use barbells, dumbbells, resistance bands, machines, or your own body weight. Squats, deadlifts, push-ups, rows, lunges, and planks are effective staples that cover most major muscle groups in relatively few movements.
If you’re new to lifting, the American College of Sports Medicine recommends working in the 8 to 12 repetition range per set, training two to three days per week. That means picking a weight heavy enough that the last two reps of each set feel genuinely challenging. Two to three sets per exercise is a solid starting point. Rest about one to two minutes between sets.
As you gain experience (roughly six months of consistent training), you can increase to three or four sessions per week and start varying your rep ranges. Heavier loads in the 1 to 6 rep range build raw strength, while the 6 to 12 range is best for building muscle size. Lighter loads at 15 or more reps improve muscular endurance. A well-rounded intermediate program cycles through these ranges over time rather than staying locked into one.
Why Rest Days Are Part of the Plan
After a strength training session, your muscles remain in a heightened state of repair and growth for at least two days. During this window, your body rebuilds muscle fibers stronger than before, and it becomes more responsive to the protein you eat for at least 24 hours after training. This is why beginners benefit from training each muscle group two to three times per week with at least one rest day in between: you’re timing your next session to land right as the recovery window from the last one wraps up.
Rest doesn’t mean doing nothing. Light walking, easy cycling, or gentle stretching on off days keeps blood flowing without taxing your recovery. What hurts progress is training the same muscles hard on consecutive days before they’ve had time to rebuild.
Flexibility and Stretching
Stretching often gets skipped, but maintaining range of motion in your joints protects you from injury and keeps everyday movements comfortable. The ACSM recommends stretching at least two to three times per week, though daily is better. Hold each static stretch for 10 to 30 seconds. If you’re over 65, holding stretches for up to 60 seconds produces greater flexibility gains.
Focus on the areas that get tightest from your daily life: hamstrings, hip flexors, chest, and shoulders if you sit at a desk, or calves and quads if you run. Stretch after your workout when your muscles are warm, not before. Pre-workout, dynamic movements like leg swings and arm circles prepare your joints without the temporary strength reduction that static stretching can cause.
Balance Training
Balance work becomes increasingly important as you age, but it benefits everyone. Effective balance exercises mimic real-life movements: standing on one foot, walking heel-to-toe, stepping over obstacles, and shifting your weight in different directions. Programs that include these kinds of movements twice a week for about 30 minutes per session have been shown to meaningfully reduce fall risk in older adults.
You can make balance exercises harder over time by closing your eyes, standing on an unstable surface, or adding obstacles. Many strength exercises double as balance work, too. Single-leg deadlifts, lunges, and step-ups all force your stabilizing muscles to work hard. If you already strength train, adding a few minutes of dedicated balance work at the end of each session is enough.
Putting It All Together
A practical weekly schedule for someone starting out might look like this:
- Three days of cardio at 30 to 60 minutes each, or shorter sessions at higher intensity. Walking, swimming, cycling, or a group fitness class all count.
- Two to three days of strength training covering all major muscle groups. Full-body sessions work well at this frequency, or you can split upper and lower body across different days.
- Stretching after every workout for 5 to 10 minutes, with longer dedicated sessions two to three times per week if flexibility is a weak point.
- One to two rest or light activity days for recovery.
Cardio and strength sessions can overlap on the same day. If you’re doing both, prioritize whichever aligns more closely with your goals: lift first if building muscle matters most, or do cardio first if you’re training for a race or endurance event.
The single most important factor is consistency. A routine you enjoy and can sustain three to five days a week will always outperform a “perfect” program you abandon after two weeks. Start with the minimum recommendations, build the habit, and add volume or intensity as your fitness improves.