Physically and mentally heavy singles training is hard on anyone. Females tend to focus on all the missed lifts instead of the ones they made...You need the singles (year's main competition coming up) but how many times do you let her attempt it so she doesn't let the misses get to her? I make the decision by looking at her physical capability at that moment (yes, she can take it; no, she's too tired/can't focus etc.) and then I ask her, "Do you believe you can make it?" Because if she doesn't believe she can take it, it can do more harm to attempt it than letting it wait for a better time.