Biggest Loser trainer Tiffiny Hall revealed her private battle with debilitating genetic illness - Chronic Fatigue Syndrome/ME and POTS - last week.
The 36-year-old felt 'very vulnerable and scared' about sharing her diagnosis at the time, as she acknowledged 'invisible illnesses' are not always understood.
Tiffiny thanked her loyal fans for their unwavering support and kind messages in an emotional update on Tuesday.
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'It can ruin your life': The Biggest Loser's Tiffiny Hall (pictured) shared an emotional update on long-term health battle to Instagram on Tuesday as she revealed what her 'cornerstones of her recovery' would be in coming months
Chronic Fatigue Syndrome / ME (myalgic Encephalomyelitis) is a disease characterised by extreme exhaustion, sleep abnormalities and, in some cases, pain.
POTS (Postural Orthostatic Tachycardia Syndrome) is an illness that affects the flow of blood to the top of the body, with symptoms including lightheadedness, fainting and rapid heartbeat.
'It's complex, its hard to understand, you may look fine and present well, but it really can ruin your life, unless you take some time out to recover properly... I'm resting up, feeling positive and ready to take this on!' Tiffiny said.
'The real root of the problem, for me, was removing some stress in my life, removing insults to the nervous system, and focusing on those pillars of TIFFXO; movement, mindfulness and nutrition. They are the cornerstones of my recovery.
'I have to re-look at the way I do things, because CFS does seem to affect a lot of athletes and target people who have type-A personalities. You have to look at your priorities and they way you do things, so it's a bit of reset.
'I'm resting up, feeling positive and ready to take this on!' Tiffiny planned to use her pillars of TIFFXO (movement, mindfulness and nutrition) to get her through her health battle
'I have to re-look at the way I do things': Tiffiny said she had to 'reset' her life, her priorities and they way she does thingsInsurance Loans Mortgage Attorney Credit Lawyer
Posting to Instagram last week, Tiffiny revealed she'd undergone 'a gazillion tests to figure out what could be wrong' before finally being diagnosed with two genetic blood pressure conditions known as Chronic Fatigue Syndrome/ME and POTS.
In her caption, Tiffiny wrote: 'Okay, deep breath. I've decided to share something very personal with you today. For some time now I've been battling a little with my health. A lot actually.'
Tiffiny admitted she's struggled to accept her condition, and has 'felt like she's hit rock bottom at times'.
'I've decided to share something very personal with you today': The Biggest Loser trainer Tiffiny Hall, 36, (pictured) lifted the lid on her long-term battle with Chronic Fatigue Syndrome/ME and POTS in an Instagram post last week
Diagnosis: Tiffiny said she'd undergone 'a