Low impact exercise for 50+ year olds, body surfing & water aerobics

Surf at Legian Beach, Bali

Each morning I see red-faced seniors jogging along the beach. I prefer to kill two birds with one stone - body surf as well as water aerobics. 

After catching each wave or waiting for a good one, you are moving through the surging water (see video) around 50 - 100 metres between waves. Catch 20 waves that's 1-2 km of low impact exercise. Cup your hands to increase resistance through the water. Great to tone up your arm and leg muscles. My dicky knee feels a whole lot better with this treatment.