Canadian Running wrote:
The study, which was published in the Journal of Strength and Conditioning Research, included 48 well-trained male runners to perform three workouts. First, they did an exhaustive interval workout followed by an incremental treadmill test 24 hours later at three speeds: 12, 14, and 16 km/h. They then received either a massage, cold water immersion (i.e. ice bath) or passive rest as a control. 48 hours later, they repeated the treadmill test.
The researchers found that the runners who received massage had recovered significantly better than the control group, and had greater stride height and angle changes as they sped up. The runners who received an ice bath, on the other hand, did not appear to experience any noticeable changes compared to the control group. “These results suggest that massage intervention promotes faster recovery of RE (running economy) and running biomechanics than CWI (cold water therapy) or passive rest,” the researcher concluded.
Study here:
https://pubmed.ncbi.nlm.nih.gov/31800477/Summary here:
https://runningmagazine.ca/sections/training/injuries/study-massage-beats-ice-bath-for-improving-recovery/