Last night on RTÉ One, we saw three families get down and dirty in the Kilruddery Estate, Co. Wicklow, for the first semi-final of Ireland's Fittest Family 2018 - the Coneys from Tyrone coached by Anna Geary, the Pierses from Kerry coached by Davy Fitzgerald and the Lawlors from Limerick coached by Donnacha O'Callaghan.

The competition kicked off with two members from each family taking on the Swamp Trek, an obstacle-filled race course complete with cliffhanger walls, 100m of bog, and an ice-cold swim.

After some deliberation, Darren and Jonah stepped forward for the Lawlors, Ciaran and Oran volunteered for the Pierses and, for the Coneys, it was Gary and Shane.

Darren and Jonah Lawlor took first place, shortly followed by the Pierses and, finally, the Coneys. After a very tough race, medical assistance was called in for Gary Coney who was diagnosed with hypothermia, ruling him out from the next event.

After all that, we would be crying for a cup of tea and a nap but, then again, these are no ordinary families. Leaving the Swamp Trek behind them, the teams took a quick breather before gearing up for a torturous time trial.

Three members from each family were nominated to take on a balance beam, monkey bars, a cargo net climb and 100m of bog. As if that wasn't enough, the families then had to sprint a log over the finish line.

Taking on this hellish challenge were Matthew, Dympna and Darren for the Lawlors; Riobeárd, Clíona and Ciarán for the Pierses; Colette, Shane and Paul for the Coneys. 

The Eliminator
After an absolutely exhausting but incredible impressive five minutes and forty-two seconds, the Coneys avoided the eliminator, leaving the Lawlors and Pierses to battle it out over hay bails, "confidence crushing" walls, a cold water dip, a cargo net climb and uphill rat tunnels.

After an incredibly intense and challenging race, the Lawlors triumphed, earning them a spot in the final.

Twitter was absolutely abuzz last night as viewers shared their admiration for the families: