The Team GB athlete had contemplated quitting the sport altogether earlier this year
Team GB athlete Jack Green has spoken about his fight with depression after making it through to the semi-final of the men's 400m hurdles.
Green spent 18 months out from athletics after London 2012 as he struggled with the mental health condition.
"I've got a lot of gratitude now, I really appreciate this journey," Green told the BBC.
"I didn't last time. I just saw it as another step up the ladder, thinking I could win this and that."
Green came third in his heat, taking advantage of a rival's late stumble to grab a qualifying spot.
“It’s hard to make an Olympics, let alone a semi-final, and hopefully a final. I just want to enjoy it," he added.
"I'm not on medication because I can't run on it, and yet I'm doing alright.
"We made a lot of steps forward in terms of my mental health and psychology, and things are in a great place."
In July, Green admitted he'd considered quitting athletics altogether ahead of Rio 2016.
"It was only a few months ago that I was going to retire and was looking for jobs and applied for jobs because things weren't in a good place," he told the Express.
"I was on anti-depressants but the problem is I can't run on them so had to come off.
"Whenever I'm on them I can't run faster than 80 per cent.
"So I'm making that sacrifice. It's a typical athlete thing of funding myself, and I'm self-coached as well.
"I coach myself and train on my own. It has been a tough journey."
Rio 2016 Olympics - in pictures
Day Seven
Britain's Jazz Carlin secured her second silver of the Games in the women's 800m freestyle, as American Katie Ledecky surged to her fourth Rio gold. GettyDay Seven
Singapore's Joseph Schooling won his nation's first gold medal with victory in the 100m butterfly as Michael Phelps was denied a 23rd Olympic title. GettyDay Seven
Sir Bradley Wiggins becomes Britain's greatest Olympian ever as Team GB win gold in the men's Team Pursuit at the Velodrome. AFPDay Seven
Bryony Page on her way to a silver in gymnastics trampoline. EPADay Seven
Heather Stanning and Helen Glover win gold in the women's rowing pairs. GettyDay Seven
Alex Gregory, Mohamed Sbihi, George Nash and Constantine Louloudis celebrate their success in the men’s coxless four. GettyDay Seven
Defending champions Great Britain won silver in the Olympic team dressage, as world champions Germany claimed gold. The British quartet - Spencer Wilton, Fiona Bigwood, Carl Hester and Charlotte Dujardin - were beaten into second by 3.334 points. GettyDay Six
American Simone Manuel became the first black female swimmer to win an Olympic title as she shared the women's 100m freestyle gold with Canada's Penny Oleksiak, 16, after a dead heat. Getty ImagesDay Six
Swimming legend Michael Phelps demolished the field in the 200m individual medley to claim his 22nd Olympic gold. GettyDay Six
Simone Biles takes gold in the Women’s individual all-around artistic gymnastics. GettyDay Six
Fiji's Vatemo Ravouvou breaks through to score during the Men's Rugby Sevens Gold medal final match against Great Britain. Team GB settled for silver as Fiji romped to gold. David Rogers/Getty ImagesDay Six
Callum Skinner, Jason Kenny and Philip Hindes of Great Britain celebrate after winning gold in the men's team sprint. AFPDay Six
Double act David Florence and Richard Hounslow won their second joint Olympic silver in the canoeing slalom. GettyDay Six
Victoria Thornley and Katherine Grainger show off their silver medals after the women's double sculls final GettyDay Five
Max Whitlock poses with his bronze medal GettyDay Five
Joe Clarke reacts to winning Britain's second gold of thee Games ReutersDay Five
Jack Laugher and Chris Mears celebrate with their gold medals GettyDay Four
David Florence suffered heartbreak in the canoe single C1 men's semi-final GettyDay Four
Andy Murray celebrates his straight sets victory against Juan Monaco GettyDay Three
Lilly King shows off her gold medal as Yulia Efimova parades her silver AFPDay Three
Russia's Yulia Efimova (left) looks on as the US's Lilly King (right) celebrates winning the Women's 100m Breaststroke Final earlier this morning GettyDay Three
Lilly King celebrates after beating her Russian rival Yulia Efimova GettyDay Three
Michael Phelps takes on Chad Le Clos in the men's 200m butterfly final GettyDay Three
Michael Phelps says it 'breaks my heart' to see drug cheats at the Olympics GettyDay Three
James Guy missed out on bronze on Monday night GettyDay Three
Louis Smith reacts to his pommel stumble which may have cost Team GB a medal GettyDay Three
Dan Goodfellow (right) and Tom Daley celebrate with their bronze medals GettyDay Three
Tom Daley and Dan Goodfellow dive into the pool in delight after winning bronze GettyDay Three
Tom Daley (left) and Daniel Goodfellow performing in the men's synchronised 10m platform final PADay Three
Canada celebrate their victory against Team GB on day three GettyDay Three
Heather Watson leaves the court yesterday after losing her second round match against Elina Svitolina of Ukraine ReutersDay Two
Carlin proudly shows off her silver medal GettyDay Two
Carlin reacts after learning that she has won the silver medal GettyDay Two
Peaty shows off his gold medal with pride GettyDay Two
Adam Peaty celebrates his gold GettyDay Two
Andy Murray and Jamie Murray were knocked out of the men's doubles by Thomaz Bellucci and Andre Sa AFPDay Two
Venus and Serena Williams suffered their first ever Olympic defeat playing together GettyDay Two
Richard Kruse battling the Russian Timur Safin GETTYDay Two
Lizzie Armitstead finished fifth in the women's road race PADay Two
Anna van der Breggen celebrates winning gold in the women's road race ReutersDay Two
Annemiek van Vleuten suffered a horrific accident in the women's road race ReutersDay Two
The women's road race passes along the beach in Rio de Janeiro GettyDay Two
Andy Murray beat Viktor Troicki 6-3, 6-2 to win his men's singles first round match GettyDay Two
Serena Williams is through to the second round of the women's singles after defeating Daria Gavrilova GettyDay Two
Gold medal winner, Hoang Xuan Vinh of Vietnam, center, silver medal winner, Felipe Almeida Wu of Brazil, left, and bronze medalist Pang Wei of China, at the victory ceremony for the men's 10-meter air pistol event APDay Two
Rowing was cancelled on day two over fears of sinking and capsizing due to strong winds GettyDay One
Yusra Mardini has won her heat of the Women's 100m Butterfly but she will not be able to go forward to the semi-final Getty ImagesDay One
Britain's James Guy chops through the water GettyDay One
Kantinka Hosszu of Hungary set a new world record in winning gold in the Women's 100m Individual Medley final GettyDay One
Samir Ait Said receiving medical help after suffering a badly broken leg GettyDay One
Yusra Mardini leads the race in the 100m Butterfly heat at Olympic Aquatics Stadium in Rio EPADay One
Natasha Hunt scored two tries to inspire Britain to victory against Brazil GettyDay One
Joanne Watmore scored Britain's first try in Olympic rugby sevens history GettyDay One
Adam Peaty celebrates after breaking the 100m breaststroke world record GettyDay One
Adam Peaty broke his own world record in the 100m breaststroke heats and is favourite to win gold on Sunday GettyDay One
Adam Peaty broke his own world record in the 100m breaststroke heats GettyDay One
Chris Froome speaks with a bruised Geraint Thomas after the men's road race PADay One
Greg van Avermaet celebrates winning gold in the men's road race GettyDay One
Rafal Majka was caught with just two kilometres to go GettyDay One
Greg van Avermaet won a sprint finish to clinch Olympic road race gold EPADay One
A bullet is marked by Brazilian police in the equestrian media centre GettyDay One
The peloton make their way along the beach during the road race GettyDay One
Chris Froome leads away the men's road race along with the rest of Team GB GettyDay One
The field make their way along the opening stages of the road race Eric Gaillard/ReutersDay One
Mahe Drysdale of New Zealand had no trouble in qualifying for the men's single skulls quarter-finals GettyDay One
Rowers warm up under the watchful gaze of the Christ the Redeemer statue GettyOpening Ceremony
A huge fireworks display signals the end of the Rio 2016 Opening Ceremony. Felipe Dana/APOpening Ceremony
Andy Murray leads out Team GB at the Rio Olympics opening ceremony GettyOpening Ceremony
Gisele Bundchen turns the stage into a catwalk during the opening ceremony APDay Eight
The men's eight gold took Great Britain top of the rowing medal table. GettyDay Eight
Andy Murray celebrates his victory over Kai Nishikori to reach the men's Olympic final. GettyDay Eight
Team GB took silver in the women's eight. GettyDay Eight
Usain Bolt breezed through his 100m heat. GettyDay Eight
Jessica Ennis-Hill continues her bid for gold in heptathlon. GettyGreen's semi-final is scheduled for Wednesday morning at 1.25am BST. He is joined by fellow Briton Seb Rodger, after a disqualification bumped his teammate up into the faster losers list.