It's like leg day, only quicker.
Excuse me, please, abs coming through.
Show that plank who's boss.
"At first I was afraid, but then I just decided I was a mermaid, and I could do this."
If you can walk, you can hike.
Stretch and strengthen at the same time.
Your body will most definitely thank you later.
Is 10K the magic number?
Put your core control to the test.