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"Did they cut more calories from their diet ... or did they become more physically active?" asked study author Kevin Hall   a senior investigator with the National Institute of Diabetes and Digestive and Kidney Diseases.
 Hall  had been "puzzled by how quickly the contestants were losing weight." So he contacted the show's physician and began studying the season eight contestants.
Early on   Hall  observed that weight loss was better predicted by food intake  not physical activity alone. But in the long term  the opposite was true.
"You have to be very physically active in order to keep the weight off  " Hall  said.
 Hall 's findings echo previous studies that promote more exercise for long-term weight loss maintenance. However  experts caution that doesn't mean people can neglect their diets in the long run  either.
This method  however  was not able to tell how much of the physical activity was due to normal daily activities -- like cleaning the house or walking the dog -- versus following a workout plan   Hall  said.
Six years later  however  the contestants' resting metabolisms still hadn't sped back up   Hall  showed in a study last year.
For  Hall   metabolic changes are just one part of the puzzle. Genetics may also play a role  as well as social factors that can make it hard for some people to incorporate so much exercise in their daily lives.
 Hall  added that it's not necessarily those who were most physically active during the competition who kept it up six years later.
How some 'Biggest Losers' keep the weight off

Billy Bush  is opened up about Matt Lauer's firing and rebuilding  his  life after the fiasco that led to  his  own ouster from the "Today" show in 2016.
 Bush  said  he 's been in touch with  his  former "Today" colleguage Lauer  who was fired by the show after numerous allegations of sexual misconduct in November 2017.
â He  texted me and asked about some of the self-help books Iâve been reading â  Bush  told People magazine. âI told  him   âStart here.â â
 He  said though  he  had a tumultuous relationship with Lauer   he  wasn't happy to see the anchor's scandal unfold.
âMaybe at one point there was part of  me  that [felt like] if someone else got [in trouble]  I would be like  âNow whoâs the bad guy?â â  Bush  said. âBut I took zero pleasure in it. And Iâm grateful for that. Let those who transgressed be held accountable. I felt for the women involved and for his wife.â
The TV personality told People magazine he was displeased with Lauer back in 2016  when "Today" fired  Bush .
On Oct. 7  2016   Bush  was heard on a years-old "Access Hollywood" recording with Trump discussing women in a lewd manner.
"In one of my resolute moments  I said if I ever speak to [Lauer]  Iâm going to tell  him  that I was let down. Many months later   he  called me and I addressed it.  He  assured me that  he  [fought for me] in private. I accepted it.â
"I have done so much self-help work. There is a term for what I did. Itâs called bystander abuse. It says by not doing anything you are endorsing the moment. I have to live with that " said  Bush .
Additionally  the former broadcaster says  he  would never want  his  daughters treated in a degrading manner.
"I have three daughters. They are going to be in the workplace one day. I want them to be paid equally  I want them to be treated well and when they walk out of a room I donât want to ever hear anyone talking behind their back in a degrading way " explained  Bush .
Although   he  has gone through a difficult 15 months  Bush  claims  he  has learned a great deal.
"I had some growing up to do anyway in life " said  Bush . "I did so much exploring and figuring out. Iâm a deeper person. And Iâm happy about using my knowledge for a good purpose.â
Billy Bush talks Trump tape scandal Matt Lauer firing: He asked me for self

Former White House chief strategist Steve Bannon  told congressional investigators that the controversial June 2016 Trump Tower meeting between Trump campaign officials and a Russian lawyer promising dirt on Hillary Clinton was “unpatriotic ” an acknowledgement of comments  he ’s tried to publicly distance  himself  from  according to sources familiar with  his  closed-door testimony before the House Intelligence Committee earlier this week.
Bannon  according to “Fire and Fury: Inside the Trump White House” by Michael Wolff  said the meeting attended by Donald Trump Jr.  Jared Kushner and then campaign chairman Paul Manafort was “treasonous” and “unpatriotic."
“Even if you thought that this was not treasonous  or unpatriotic  or bad sh--  and I happen to think it’s all of that  you should have called the FBI immediately  ” Bannon  said  according to Wolff.
 He  later attempted to walk back the comments  which reportedly angered President Trump  saying in a statement that the eldest Trump son “is both a patriot and a good man ” and that the “treasonous” comments were directed at Manafort.
Two sources familiar with  Bannon ’s congressional appearance tell ABC News that  Bannon  stood by  his  description of the meeting as “unpatriotic ” but told lawmakers  his  initial description of the meeting as “treasonous” was exaggerated.
A third source familiar with  Bannon ’s interview told ABC News that  Bannon ’s characterization of the meeting as “unpatriotic” behind closed doors was only a reference to Manafort  not Trump Jr. or Kushner.
 Bannon  only said that the meeting “displayed poor judgment” on the part of Trump Jr. and Kushner  but was “excusable because they were newcomers to political campaigns ” the source said.
 Bannon  also told the committee  he  was speculating when  he  suggested to Wolff that it was likely that Trump Jr. brought the Russian lawyer and other individuals in the meeting to meet with Donald Trump in Trump Tower  according to two sources.
"The chance that Don Jr did not walk these jumos up to his father's office on the twenty-sixth floor is zero ”  Bannon  told Wolff.
Sources familiar with  Bannon 's interview said  he  also told the committee that  he  had communicated with former White House chief of staff Reince Priebus  press secretary Sean Spicer and Mark Corallo  the former spokesman for the president’s legal team  about the Trump Tower meeting after the New York Times broke the news of the meeting in July of 2017.  Bannon ’s comments to the committee about these conversations were first reported by Axios.
 Bannon  is expected back before the committee later this month after  he  refused to answer questions about  his  time working for Trump during the transition and in the Oval Office.
 Bannon  did not respond to a request for comment.

Bannon tells Congress he called Trump Tower meeting 'unpatriotic': Sources