Mikeinslc saidLast two days were hardest. Is this common? No weights just yet, have to work up the balls to make it on to that floor.
Started the week at 1 mile then 1.3, 1.5, 1.6 miles jogging been biking since Thursday, started having shin splints (OUCH)
Much depends on the condition you're in when you start. As a general rule, because the body needs to rest, it's best to alternate sessions, ie: cardio one day, strength the next. And a REST DAY.
I've coached at the Olympic level. We had athletes who could sustain nine or more training sessions per week, and up to 25 hours. But it takes years to move up to that, and even there, they take very serious half-days for rest, and a full rest day.
Shin splints are telling you you're pushing too far; pain is there for a reason. Listen to it.
There are some very good books on training; the best I know of is Serious Training for Serious Athletes
. Don't rely on folklore at the gym - get expert advice.