You either have to go to a laboratory and do something like a Wingate Test. So this is a 30-second maximal test where you're going to see how much work can you possibly do in that 30 seconds. If you don't have access to laboratory, you can do this on any protocol you want. This could be sprinting. This can be on an air bike. This could be on a rower, anything like that, anything where you can exert maximal effort and you don't have to worry about technical problems.