Gist
Yes. A rowing machine is excellent for cardiovascular fitness because it can produce high oxygen demand through coordinated work from both the upper and lower body.
Yes. A rowing machine can support fat loss by adding full-body energy expenditure and aerobic work, but body-fat reduction still requires a sustained calorie deficit.
Yes. A rowing machine can support weight loss by providing vigorous full-body aerobic exercise, but lasting results still depend on maintaining an overall calorie deficit.