How much you sweat isn't a measure of how effective your workout was

A workout with zero sweat can be more effective than one that soaks your shirt

Heavy sweating is often intuitively read as a sign of a 'real,' effective workout, and a dry shirt afterward as a sign you didn't train hard enough. In reality, sweating is primarily a thermoregulation mechanism — a response to rising body temperature — not a direct indicator of calories burned or the quality of the training stimulus your muscles just got.

How much someone sweats varies widely between people for reasons unrelated to workout effectiveness: fitness level (trained people often start sweating earlier and more heavily because their thermoregulation is more efficient), room temperature and humidity, genetic differences in sweat gland density, and even how hydrated someone happens to be at the time.

A strength workout with adequate rest between sets in a cool gym can produce minimal sweat while still being excellent for muscle stimulus. Better to track objective progress markers — working weights, reps, technique — than how many shirts you went through after training.