Unrelated queries:
If you are doing your own hiit plan, how slow should your slow sections be? I was trying hiit in the pool, swimming one length flat out then going really slow on the next 2 (mostly because I was proper knackered). Is this ok or should I aim for slower but not dead slow?
Secondly I currently do no strength/weights work. I don't go to the gym, just do stuff at home. I'm conscious that as I'm in my early 40s, some weight bearing exercise would be good. Are there any good body weight workouts on YouTube anyone could suggest or do I need to actually get weights? I have a dodgy knee so have to be v careful if squats and stuff.