Agents of SHIELD arms, legs, and abs.

Do just one body part (arms, legs, or abs), or all three if you're ambitious.

Combat, training, or fist fight
Superpowers
          .....30 second plank
          .....15 backward leg lifts each side
          .....20 bicycles

Skye uses a computer
Reference to other MARVEL universe characters
          .....15 lateral raises
          .....15 forward leg lifts each side
          .....10 reverse crunches

Anyone says SHIELD
          .....15 shoulder presses
          .....20 sumo squats
          .....20 Russian twists

May pilots the plane
Weapons of any kind are drawn or used
          .....15 tricep pushups
          .....30 second wall sit
          .....20 oblique/side crunches each side

Whispering, plotting, clandestine planning
          .....20 bicep curls
          .....30 calf raises
          .....20 crunches

Scene takes place in Fitz-Simmons' lab, or they Do Science
          .....10 push ups
          .....20 jumping jacks
          .....10 straight leg lifts