The best part is no fancy equipment, expensive gym membership ... or split up the workouts into lower body or legs one day and upper body or arms another day, your results will be similar.
If you want to build muscle, you may think that you need a gym full of equipment to see ... 20-minute bodyweight strength workout to develop full-body muscle without a weight in sight.
Exercising in water can provide a great full-body workout without some of the drawbacks ... the facility will likely provide any necessary equipment. Some pools may even have water treadmills ...