Natural bodybuilder Jeff Seid is taking full advantage of his bulking season. In his latest Instagram post shared on Dec. 10, 2025, he showed off his full push workout for adding size and developing an aesthetic chest.

Having nailed down his IFBB Pro card at just 19 years old, Jeff Seid ‘s a bodybuilding prodigy. He has found remarkable success onstage and has maintained his status as a lifetime natural athlete. He won the Men’s Physique Amateur Olympia title in 2024, proving that even after the years had gone by, he had only improved.

Seid made the highly anticipated jump into Classic Physique , which required him to put on significant size. He managed to gain 30 pounds in four months on a clean bulk. This paved the way for him to shine at his last contest back in May, where

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