The calf muscles help push venous blood from the legs when they contract during walking or ankle movement. Calling them a “second heart” is a metaphor; it is not evidence that calf exercises treat heart or blood-vessel disease.
What the referenced video discusses
The saved transcript identifies three topics: what the “second heart” means, the role of the calf muscles, and the effects of sitting for long periods. This article uses that scope and checks general health statements against the linked health sources. The video’s audio and visuals have not been rechecked as part of this recovery.
Calf movement and venous return
When the calf muscles contract as you walk or move your ankles, they help push venous blood upward from the legs. Sitting still for a long time reduces movement. Gentle ankle flexing or heel raises may be an option if they do not cause pain and you have no medical restriction. Movement is not a substitute for assessment of possible vein, heart or artery problems, and a repetition count from a video should not be treated as a treatment plan.
Try changing position and walking periodically when practical. If you develop sudden leg swelling, pain, redness or warmth, seek medical assessment—especially if you also have shortness of breath or chest pain. Do not massage forcefully or exercise to treat a new symptom before its cause is known.
Practical reminders
- Set a reminder to change position as appropriate.
- Try gentle ankle movement only if it is comfortable and not contraindicated for you.
- Seek medical care for sudden or painful leg swelling or other acute symptoms.
This is general information, not an examination, diagnosis or individual treatment plan. Contact a healthcare professional about sudden or severe symptoms or before changing medication or supplements.
Original video
View the source video cited in the Thai article: Open the original video on YouTube.