The heart monitor is a good tool when you feel your fitness stalled or is declining. The heart doesn't lie and is a good indicator of the state of things.
PM - F500 - a little gym work...
In random order...completed the following at a leisurely pace:
Goblet squats 3 x 8 (50,53,53lbs)
Single leg squats - alternating legs - 2 x 10 (12")
Jump squats 3 x 6 (30lb db's)
DU's 2 x 25-30