Along with handling job-related hassles, mena is struggling to keep up with her night classes. as the pressure mounts, mena finds that she is often unable to go to sleep at night or that she repeatedly wakes up during the night. mena's sleep disturbance is best described as:

Insomnia 3.

Explanation:

Insomnia may be defined as the condition in which the person is not able to sleep properly. This medical condition is also known as sleeplessness and a sleeping disorder.

Insomnia 3 is mainly characterised by the condition in which the individual is not able to sleep for the particular reason. The build up of pressure makes the individual sleep restlessness. The individual wake up repeatedly at night. Mena shows the condition of Insomnia 3.

Thus, the correct answer is insomnia 3.

these are common warning signs of overtraining syndrome:

washed-out feeling, tired, drained, lack of energy

mild leg soreness, general aches, and pains

pain in muscles and joints

sudden drop in performance

insomnia

headaches

decreased immunity (increased number of colds, and sore throats)

decrease in training capacity/intensity

moodiness and irritability

depression

loss of enthusiasm for the sport

decreased appetite

increased incidence of injuries.

a compulsive need to exercise