The Point Of Stretching

Muscles are a grand amalgamation of thin actin, thick myosin, calcium ions binding to troponin, tropomyosin and Z-lines. They require ATP to be relaxed and use ATP when they undergo contraction.

Stretching helps realign and lengthen muscles to prevent them from being tight and easily injured.

How are muscle contractions triggered in the first place?

Motor neurons use the neurotransmitter acetylcholine to send messages to muscles, prodding them into action. This causes the in-flow of sodium ions, propagating the action potential onward through the muscles. In turn, this invokes the release of calcium ions inside the cells.

The calcium binds to troponin and the obstructive bits move out of the way, allowing actin and myosin to meet for a sweet, brief moment. This is cross-bridge cycling

References

  1. Biology Stack Exchange. (2015). How is ATP involved in muscle contraction?. [online] Available at: https://biology.stackexchange.com/questions/31323/how-is-atp-involved-in-muscle-contraction [Accessed 26 Jan. 2018].
  2. Anon, (n.d.). Muscle Fiber Contraction and Relaxation. [online] Available at: http://oerpub.github.io/epubjs-demo-book/content/m46447.xhtml#fig-ch10_03_01 [Accessed 26 Jan. 2018].
  3. The MIT Tae Kwon Do Club. (2008). STRETCHING AND FLEXIBILITY – Physiology of Stretching. [online] Available at: http://web.mit.edu/tkd/stretch/stretching_2.html#SEC13 [Accessed 26 Jan. 2018].
  4. Harvard Health Publishing. (2013). The importance of stretching. [online] Available at: https://www.health.harvard.edu/staying-healthy/the-importance-of-stretching [Accessed 26 Jan. 2018].
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s