Hi,

For future reference, it is really better to ice 10-15mins every two hours to get the greatest effect from icing.

1.) How do you know that it's a rec fem strain? Did you feel a sharp pain in your quadriceps while you were running? Did you have to stop immediately, or did it slowly build on?
2.) Assuming that it is a rec fem strain, you should really rest it from activity for 48-72 hours post injury. It gives the muscle adequate time to patch up the tear and lay down some scar tissue. Do as much as you need to, no more.
3.) If it is a rec fem strain, gentle stretching exercises can be commenced after the 72hour window has elapsed.

Ultimately the best thing you could do is to get it assessed by a physio not only to manage the injury but to screen you for why you strained your rec fem running on a treadmil.

Cheers