Episode 5

What's Your Sports Day Event? is the fifth episode of the Dumbbell Nan-Kilo Moteru? anime.

Summary
At school, Aina-sensei tells the class to choose what events they want to do for Sports Day. The class ends up doing lots, with Hibiki ending up being part of the 400m relay. At the gym, Machio suggests that Hibiki, Akemi, Ayaka and Satomi should train their hamstrings by doing leg curls. Hibiki is passionate about doing the exercise when Satomi, Akemi and Ayaka notices that she has ripped her shorts in a very embarrassing area.

The next day, Hibiki, Akemi and Ayaka are walking to school when Hibiki complains about how sore she is due to the exercise. Later, the final event of Sports Day is the relay with Hibiki and Akemi serving as the anchors for their respective classes. While awaiting her turn, Hibiki remembers how Machio instructed her to try the Bicycle Crunch. When her turn finally comes, her classmate drops the baton. Picking it up, Hibiki continues the relay and finishes in second place behind Akemi. She is satisfied with her accomplishment until she receives the unfortunate news from Satomi that her class is disqualified because she illegally picked up the baton.

At the gym, Machio gives Hibiki, Akemi, Ayaka and Satomi raffle tickets as a way to celebrate the Silverman Gym being open for six months. Afterwards, they head to gym's sauna. While everyone is relaxing, Hibiki makes a bet to see who can stay in there the longest. In the end, Hibiki emerges as the winner. She then receives some T-shirts from the raffle.

How to Use a Hamstring Curl Machine

 * Tighten your butt.
 * Gently flex your hips.
 * Keep your torso flat without your stomach touching the seat.
 * Slowly raise your leg up and down without lifting your hips.
 * Bend your legs until the pad makes contact with your butt.

Effects

 * Isolates and trains the hamstring muscles (semimembranosus, semitendinosus and biceps femoris).

Bicycle Crunch

 * Lying face-up with your hands folded behind your head.
 * Lift up your head while also clenching your stomach.
 * Then bend one knee and touch it to the opposite elbow.
 * Alternate.

Effects

 * Trains the entire core (including the rectus abdominis, the obliques and the iliopsoas).

Notes & Trivia

 * Burning fat in a sauna is a common misconception. Your weight decreases afterwards due to sweating out a lot of water.