i need lots of help on this. whenever i play tennis there will be weeks where i hit the ball hard and very consistent and the next week i go on what i call a "great deppresion". my shots are nowhere near as fast as they were and my consistency drops soo much. is the problem practice? do i need to practice more? isnt 5 days a week, 3 hours per day enough? thats how much i practice and sometimes on weekends. what do i need to do to make myself stay consistent with power?? im doing the same swing and stroke that gave me good results but this time the balls go long by about 5 inches. do i need to practice on weekends to achieve the same results? is 1 day of practice on a weekend enough?