May seem odd, many REDS or borderline REDS can train less and improve more.
If your family tells you that you are looking thin generally people probably overdoing it.
Tips - increase body size (not saying gain weight as that triggers, but increase body size and frame and gain some natural strength from it), 1-2 days completely off run, bike swim, lift each week, reduce caffeine (if caffeine causes stress / anxiety and reduces relaxation), get blood tests. Do sprints and halfs not fulls.
Not had REDS but had borderline anemia before. Prob overlap.