Rarely does one get optimal anything regarding training and regeneration until they achieve enough success that they are able to create ideal protocols. At some point in the beginning you are trying to find your way. If you want to jump into an Epson salt bath post tempo then you could argue this further removes lactates as would the tempo if done properly. ( providing tempo is having the desired effect and you are getting a proper flush from the work the day before). The last thing I ever wanted to do was to get hotter and jump into a bath after Big Circuit or 2 sets of 10x 100 or push up , sit up workout. Often I did a cool or cooler ( cold) shower if I could or contrast shower with warm water to tolerate cooler or cold.