In Detail
Exercise without weight loss is a common and frustrating presentation. Several factors usually overlap. Cardio-heavy programs increase hunger more than fat loss; without an explicit nutrition strategy, intake quietly rises to match expenditure. Inadequate protein intake leads to muscle loss during caloric restriction, lowering metabolic rate. Insufficient sleep raises cortisol and impairs glucose handling.
Hormonal contributors are often missed: undertreated hypothyroidism, insulin resistance, low testosterone in men, and the menopausal transition in women all blunt the response to exercise. Medications including some antidepressants, beta-blockers, and corticosteroids can also be a factor.
A proper evaluation looks at the full picture — labs, sleep, training program, nutrition, medications — rather than assuming the problem is effort.