He singles out such men as US president Joe Biden, aged 79, Donald Trump, 75 now and
thinking he can regain the presidency at the age of 78, and Vladimir Putin, 69 and bulletproof.
"Because of the knee replacement I was able to exercise more freely and during the second (Covid) lockdown ... controlled eating, no more hui, no dinners, less alcohol, etcetera," he said.
Tomoana and Barber were the sole candidates for the chairmanship when nominations closed on February 28, and there will also be elections in two of the six constituencies – northernmost Wairoa and southernmost Wairarapa.
Sitting member Nigel How will be opposed by Naomi Wilson in Ngati Kahungunu ki Wairoa Taiwhenua and incumbent Melissa Ihaka faces challenges from Andrea Rutene and Jennishavorne in Kahungunu ki Wairarapa.
Other sitting members George Reti (Te Taiwhenua o Te Whanganui-a-Orotu, Napier), JB Heperi-Smith (Te Taiwhenua o Tamatea, Central Hawke's Bay) and Hayden Hape (Kahungunu ki Tamaki-nui-a-Rua, Tararua) are re-elected unopposed, while also unopposed is newcomer Thompson Hokianga (Te Taiwhenua o Heretaunga, Hastings).
The taurahere (not resident in the rohe) will be newcomer Eruera Beattie (North) and incumbent Brian Ruawai-Hamilton (Southern).
About 19,500 iwi members are eligible to vote. Voting material will be sent to those on the roll later this month, and voting closes at midday on April 26.