General Physical Preparedness.What's GPP VM?
For most it's 90 minutes of exercise per week with a heart rate between 120-130. If you are an active adult you should add some degree of high intensity work as well. I alternate between pushing a sled, hill sprints (long enough hill to take 15-30 seconds to get up and around a minute or two to walk down) and doing 20 seconds balls to the wall / 100 seconds rest on the rogue echo bike. All high impact stuff is done as many consecutive times as you can handle within reason. Usually it's around 8-12 depending on the day. High intensity training is great for surfing because the nature of surfing is sprint (paddling for wave scratching for duck dive or shoulder) and low intensity (ridding or paddling back out). It also does wonders fro lung capacity for beatdowns.