Burner!Try a few handstands against the wall - if you get the hang of it try 3 x 1min holds - remember to squeeze your shoulders up passed your ears and stay strong through your core - no bananas.
Walk through the regular swimming warm-up after the handstands -
which includes the glute bridges...then:
8 Rounds of:
12 walking lunges
10 air squats
12 walking lunges
10 squat jumps
5 full pushups &15 situps - to recover :)