Actually I'm coming from one right now. I wasn't out as long as you, 10 days, lost 10bs, not 25lbs.

I find that the best way to regain lost strength is high frequency, submaximal work.

-Pick 4-5 lifts that cover the whole body

-Do 3-5 work sets of each, every day

- Use a linear double progression:

Start by doing sets of 5 reps. Start with a light weight, well below what you can currently do for 5 reps.

Every day add 5-10lbs on each lift.

When you cannot add even 5lbs on a lift, shift to sets of 3 and keep increasing the load daily.

When you cannot add 5lbs on a lift for sets of 3, switch to sets of 1 and keep increasing the load daily.

When you cannot add weight for your sets of 1 for 3 consecutive days, switch to a more normal program.

NOTE: you only perform on rep number per workout....

For example you do 3 sets of 5 every day, adding 5-10lbs at every workout... you do all your work sets of one day with the same weight.

When you cannot go up in weight with sets of 5 in one workout, you switch to sets of 3. Keep adding weight every workout (doing all 3-5 sets in one workout with the same weight). When you cannot add weight for sets of 3, switch to sets of 1 and keep adding weight at every workout.