Prune/Cut-come-again leafy greens or not?

[jiemslie]

Does pruning/cut-come-again harvesting leafy greens result in an overall increased yield compared to just leaving them alone? I have some arugula and kale and was wondering if i should pick the lower older leaves or just leave them if i want to maximize yields. Also if anyone knows any experiments/research done on this, do link it since most i found was about pruning fruiting plants.
Also Im in a pretty hot area, will pruning/harvesting leaves delay bolting?

 

[Anniekay]

Cutting off any flowering spikes before they have a chance to open delays bolting somewhat.

As far as yields, I personally prefer the smaller leaves so I do cut the outside leaves, as they are usually biggest, and the plant, since it already has enough root to support the number of leaves it had before trimming, immediately starts replacing what I took. Seems to be a larger harvest to me.