To Gym or Not to Gym

Today:
Distance: 5.8 km
Time: 30' 02"
Rate: 5' 10" per km
Weather: cloudy, temp 23 degrees, humidity 50%, wind calm
Week: 45.55 km
Dec: 273.4 km
Year: 4705.5 km

Conditions outside looked fairly average about noon, so I had some lunch, watched the news, then thought some more about going for a short run or going into the gym or doing nothing.
Opened the door to the gym, looked inside, no inspiration to go any further, so I got changed and headed outdoors. The sun was showing itself through the clouds, but I did get a short run in, and 15 minutes in the water at Pine Is.
A slightly sore left hammy, probably a result from Sunday's fast pace keeping up to Liz Bennett, not use to running fast at the moment. Memo to self, get back to the oval, lane 5 will be free now for a while. Soreness disappeared after cool water treatment.
The gym door was open when I returned, went inside, sat in contemplation wondering exactly what runners should do in the gym. Leg work, do enough of that, other muscles, don't need to be any bigger than I am, power to weight ratio. Walked out, still wondering.