Plan a gym session by muscle group.
A gym session's length is dominated by rest, not by lifting. Counting total sets as muscle groups times exercises times sets, then allowing roughly forty seconds under load per set plus your chosen rest between them, produces a realistic duration. Sets per muscle group is the other number worth watching: ten to twenty weekly sets per muscle is the range most hypertrophy research supports, and this shows how today's session contributes.
Session length from set count
Total sets = muscle groups x exercises per group x sets per exercise; session minutes = (total sets x 40 s + (total sets - 1) x rest) / 60
These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.
Most productive sessions run 45-75 minutes of working time. Beyond that, quality per set tends to fall faster than the extra volume helps.
Around 6-12 quality sets, repeated twice a week, covers the useful weekly range for most people. Very high single-session volumes have diminishing returns.
No — only working sets. Add five to ten minutes for general warm-up and ramp-up sets on the first compound lift.