On Monday I went to the gym with 25kg ruck sack and beasted it for 2 hours, did some stretches, eat plenty of protien, on Tuesday I went for steady 4 mile run, then wed, thurs 10 miles steady cycle round trip to work, friday 10 mile round trip on bike and 4/5 mile trail run again steady, surely the cycling wouldn't be enough to make my legs tired, they feel very dead, I'm struggling to keep heart rate raised when training. I'm really up for a good run but don't think my legs can carry me, any recomendations?