Young people are building fitness portfolios. Solidcore wants a bigger piece of them.

Solidcore, a boutique fitness brand, is introducing its first new class format in nearly 13 years. The class, called Ascend, is a high-intensity, heated, floor-based strength training session that emphasizes heavier weights and progressive strength training. It will debut at Solidcore's upcoming Manhattan West studio before expanding to other locations. The move reflects a bet on resistance training as a growing trend in fitness, particularly for longevity.

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