Cold hands and feet, overall fatigue, short duration of sexual activity, lack of energy - is it Yang deficiency or Yin?

Patient's question:

Cold hands and feet, overall fatigue, short duration of sexual activity, lack of energy, sweating profusely when working

Doctor's answer:

Pay attention to adjusting your diet and lifestyle. Participate actively in physical exercise on a regular basis to improve physical and mental fitness, enhance willpower control, and avoid indulgence or sexual activity after fatigue. Consume more foods that have the effect of tonifying the kidneys and consolidating essence, such as chestnuts, softshell turtle, pigeon eggs, and pig kidneys.