Quick strength gains and losses, whats up?
First of all i should tell u strength does not come easy to me, i started benching 50kgs, military 35kgs, deadlifting 78kgs etc etc, over 7 month period i've only gained 20kgs on bench, 9 on military and 10 on deads, but lately i have been getting some good gains but then i seem to lose them, usually im doing my excercises twice a week and i'd say do bench on monday for 6, 5, 5, 4, 4, at 68kgs,then ill do it again on thursday and be able to do 73kgs for 6, 6, 5, 4, 4. But then ill try 73kgs, and be struggling to get 4 reps out, same with my other excercises, my diet stays the same, never drops in calories, aways get good rest, water etc etc...
What could be happening? It's messing with my head, i want more strength and im getting it but then im losing it, it's not fair. Thanks for any help.