A fat thigh is bigger than a muscular one. Think Yoga poses with blocks about a ballet dancer they're very muscular really, they're all muscle and no fat and they Yoga poses with blocks aren't big at all. The fear of getting big is based on the bodies of bodybuilders, whose aim it is get large. They eat to grow and they exercise to grow.
But we aren't going to do that. We are only lifting weights to maintain muscle mass, create lean bodies, and improve our posture, skin tone, and overall health. Lifing weights on the ball is fun and effective.
And it's tough! That's because you're working to balance your body as well as move the extra weight you're holding.
The yoga sign was overall often used as signifying sadhana or ritual'. When the texts gave a description of yoga they often listed six limbs – not the eight of Patanjali. The Southern expansions add some system to the Northern Upanishads' flimsy yoga descriptions.
They linked them to Tantric signs like bindu, subtle body, chakra, visualisations, granthis (knots), and new mantras.
The scholar and yoga-populariser G.Feuerstein (1998) subdivides the 21 yoga-Upanishads into 5 groups. The first group is called The Five Bindu Upanishads: Amriti-bindu-, Amrita-nada-bindu-, Tejo-bindu-, Nada-bindu- andDhyana-bindu-Upanishad.
They all have strong marks of Tantric discourse, not surprising as bindu was a central Tantric notion. Among these five Upanishads, it is the Amrita-nada-bindu-Upanishad which contributed most to yoga understanding. It described a six-limb-yoga, which commenced with mantra recitation; the text discusses the subtle winds (of the subtle body) and some esoteric seven gates.