Muscular failure does not have to induce breathlessness. You can train a small muscle such as calves to failure with little to no impact on cardiovascular systemintensity the faster you reach exhaustion, breathlessness
Yes I agree, I always make sure to take long rest periods between sets. This why I say that HIT doesn’t mean “dropping to the floor” like in body by science (which we both agree is not a good thing)You can do high intensity sets but than you need long pauses in between sets.
Sprinters will often do a set of 10 x 30m dashes at almost 100% but they will have a 3-5 minute break in between each run