Surprised, nobody mentioned Bodyweight exercises. They build basic foundation on which you can add others like running, cycling, swimming, whatever etc. When I

Surprised, nobody mentioned Bodyweight exercises. They build basic foundation on which you can add others like running, cycling, swimming, whatever etc. When I tried 10 burpees first time heart rate shot to 170-180. Made me question my existence along with all poor life style choices. Good thing is, you need not to waste to time traveling to gym, other places to pursue other activities. Can be done at home, hotel, park wherever you are.