Low-energy availability research: what's the actual threshold for lifters?
I've been diving deep into the low-energy availability (LEA) research lately, and I'm curious about what the threshold is when it comes to lifting performance and recovery. A lot of studies suggest that being in a state of LEA can really mess with your gains, but how low is too low?
For instance, Schoenfeld and colleagues (2018) looked at the relationship between energy availability and muscle hypertrophy, noting that levels below 30 kcal/kg FFM (fat-free mass) could start affecting performance. But then I see other papers, like Morton et al. (2021), that discuss how even moderate caloric deficits can impact muscle protein synthesis. What's confusing is that there's a lack of consensus on the exact cutoff that we should be mindful of, especially as an intermediate lifter.
If anyone has insights on where the sweet spot is for energy intake without sacrificing recovery or strength, or if you've seen differing thresholds in practice, I'd love to hear your thoughts. How are you guys navigating this balance while still trying to hit those PRs?