At that time, Shri Ramkrishna Paramhans had explained the meaning of 'Sai' in his pravachan, In the opinion of power, the one who has acquired the world i.e. a Siddha Purush is said to be Koul, according to Vedant, it is Paramhans, so according to Boul Vaishnav (a sub custom of Bengal) it is called Sai.
The tibialis anterior muscle is the largest muscle located in the anterior (front) compartment of the leg. The blood supply to the tibialis anterior muscle comes primarily from the anterior tibial artery and its branches.
Your abs and obliques are core muscles while your quadriceps are the large muscles in the front of each upper leg. These stabilizer muscles contract with little movement during the exercise. For example, you contact your abs and obliques to help keep your back straight during the push-up.