I have been inactive after I fell with my motorcycle but have recuperated fully in order for me to start training again. Our boxing gym opened yesterday so I have been training my self quite hard at home to regain my fitness. A bit of background first: I do floor exercises (push ups, burpees, sit ups, etc) a little weights with dumb and barbell and then do at least 8 to 10 rounds on heavy bag and maybe two on the double-end bag (3 min and 1 min rest). Very little resting in between movements. I take creatine and the last week BCAA about 30 min before and during my training. Question: Yesterday felt fine, did all my floor and weight training but come round 5 I felt like e deflated balloon all of a sudden. No energy, battled to hold my arm up properly. Kept going for another two rounds battling and finally gave up. Rested first time for about two minutes and then went for usual 1.5 km run. Started off good , did uphill no problem and again I had this feeling of hitting a wall. Experienced that when I did cycling but not in my boxing. Why? In the last 7 days I trained Sat,Sun, Tue,Wed Sun and yesterday. I don't think it is a case of over training, not with that many days not training. Am quite fit for my age but didn't enjoy this deflated balloon feeling! Any advice and or suggestions? Could it be the BCAA? I do sparring but no fighting but my first class in more than 4 months only tonight. Thanks in advance.