I have been tracking this and similar developments/shifts in recovery protocol because of my tendon problems. All the newer protocols for Achilles tendonitis call for relative rest, which means you avoid only specific activities but otherwise stay active. This avoid muscle atrophy and encourages/improves blood flow, helping healing, whereas as total rest does neither of those.
The other thing I’m following are the new findings that anti-inflammatories can impede healing. I take a prescription nsaid for knees and joint pain, but I also have a tear in my Achilles tendon, and I have to wonder if it’s slowing down the healing for that. But I’m hesitant to stop the nsaid, the last time I went off it for a week, I could hardly bear it…