VK is designed to heal or send energy for 30 minutes after a request is placed.
So you can request after every 30 min.
Sir has conducted many experiments on VK and guided that after a request is placed, VK will send energy continuously only for 30 min. After 30 min VK remains idle.
IF you wear VK, VK will follow your positive clear intentions 24 x 7.
You can use multiple VK to boost the healing if the energy requirement is more. Or you can take charged water, one sip every 10 min to increase energy levels.