In a recent Instagram video, celebrity fitness coach Siddhartha Singh, who trains actress Tamannaah Bhatia, revealed that some popular workouts can actually hinder your progress. In certain cases, these exercises may even cause you to appear larger around your waistline.

Here’s what Siddhartha said about these exercises, explaining why these moves could do more harm than good.

1. Sit-Ups

Sit-ups have been considered a classic ab exercise, but Siddhartha warns they are not as effective as people think. ' It does absolutely nothing for your core. The only thing this is going to give you is a strained neck and high chances of an upper back injury. '

2. Russian Twists

The next move Siddhartha highlighted is one of the most popular exercises seen on social media , the Russian twi

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