Evidence from multiple studies supports the claim that Surya Namaskar, a sequence of hatha yoga postures, improves both cardiovascular fitness and flexibility.
The claim is specific and falsifiable, meeting the criteria for empirical verification. The retrieved literature includes multiple peer-reviewed studies and systematic reviews examining Surya Namaskar and hatha yoga. Papers [1], [3], [5], [6], [9], and [10] all present direct empirical evidence demonstrating that Surya Namaskar and related hatha yoga practices improve physical fitness outcomes such as cardiovascular endurance, autonomic function, and flexibility. None of the provided papers refute the claim.