I always hear about how a lot of professional fighters and martial artists train something like 8-12 hours a day. How does the body handle that, and what is the routine? I'm assuming they don't go to failure on any particular drill or exercise, until they can barely do any more repetitions. For instance, if they lift weights, they won't go quite to the last rep. Or if they hit the bag, they won't do so many rounds that their forms starts to look sloppy. Or they won't run a damn marathon, but they'll do a good 5-10k. Etc, etc. I personally train about 4-5 hours a day, only in striking. I study 2 arts, Muay Thai and Hung Gar. Generally, my routine for a hard day of training (4 days a week) will look like this... 11am-1pm: -Warm and stretch for 10 minutes -30 minutes of weightlifting (never to failure on any sets, and different muscle groups on different days) -30-35 minute run (i generally polish about 4-5 miles in this time, sometimes flat, sometimes hills) -30 minutes of Hung Gar forms 6pm-8:30pm: Either at my Muay Thai school or at a health club with my friend -Warmup and stretch -2 rounds of jump rope -1 round of shadow -hold thai pads for 4 rounds -hit thai pads LIKE A BEAST for 4 rounds -sometimes hold and hit focus mitts for a round or two -Spar anywhere from 3-8 rounds, depending on the day -Clinch for 5-10 minutes (I should do more, I know) -Hit the bag for a bunch of rounds, doing pushups and squats in between the rounds -A few sets of pullups and crunches at the end *Each round is 3 minutes, with 1 minute break That's pretty much what I'll do every Monday, Tuesday, and Thursday. And on Friday night I'll do the morning routine, and on Saturday early in the day I'll do the evening routine. So I get 4 sessions of both those routines per week. What I'm thinking about doing is possibly going to a grappling class that starts about 8-ish or 9-sih, right after finishing my Muay Thai. The class is about an hour and a half, and it's 5 minutes away from Mauy Thai. I want to try that twice a week, like Monday night and Thursday night. However, I'm worried about burning out. Will a 4 hour bout of training, twice a week, be too much? Is that how long some professional fighters train for in a single period? I'm assuming a big key is knowing how to relax (something I finally learned how to do very recently), and drinking gatorade to replenish your nutrients during the workout. I already eat very healthy and drink LOTS of water, so I got those bases covered. What do you guys think?