Renata Mendonca is a BBC journalist and one of the founders of Dibradoras ("dribbler girls"), a Facebook group for female football fans.

She says media coverage in Brazil is almost totally focused on men's sports.

Adriana Behar, an Olympic medal-winning beach volleyball player, was president of the Women's Committee on Sport during Rio 2016.

"We still have to face a lot of challenges," she says.

She agrees with our presenter's assessment that sexism is deeply ingrained in Brazilian culture.

They agree that "small revolutions" can start to change things.

Some Outside Source listeners have sent in their thoughts as to why women are held back in the sporting world.

One woman from Tanzania says: "One of my problems was being on my period – I had excruciating pain and was sick. You are unable to perform at your best and are in conflict with yourself and have insecurity."

Azra in Pakistan says that in her country, things are difficult due to societal norms.

"The role of women in sport is limited - many women in Pakistan want to be professional players but cultural norms put limitations on women."

But a listener in Malawi says that the women's netball team there has been "really supported in terms of [media] coverage".

Rodrigo Pian, a coach at the PSG Academy, says that when he was a schoolboy it was normal to exclude the girls from football, and tell them to stick to other sports.

I was a "boy of my time", he says. But now he coaches about 40 girls at the academy, alongside a few hundred boys.

"The girls are great to teach, they listen and are very focused," he says.

Maira Liguori, a member of a women's empowerment NGO called Think Olga, says girls' relationship with sports changes once they become teenagers.

She said Think Olga studied 2,000 girls to understand their relationship with sports during their lives.

Whilst they are children sport is "fun and joyous" but once they go through puberty "this experience changes a lot - it's more about getting fit, their appearance", she says.

They also have to deal with their periods. "It's much more difficult for them to go through this time than the boys."

Image source, Getty Images

You have been sending us your ideas on how the experience of sport can be improved for women and girls.

Welsh rugby player and one of last year's 100 Women Sian Williams picked some of her favourites:

• All youth sport should be mixed gender until at least secondary school age and this should not just include training sessions but also competitive events says Richard from Swindon, UK

• Men's and women's matches should be alternated at major tournaments, such as rugby sevens events, to encourage fans to watch the women players and perhaps develop an appreciation for women's sport, writes Roberta from Dublin, Ireland

• Coaches in mixed-team sports should not just field the minimum amount of women players required at any one time. If coaches' attitudes change, so will the attitudes of the rest of society, argues Gustavo from Genoa, Italy

Read more ideas, and Sian's responses.

Luiza, a keen 13-year-old football player, says it can be difficult as a girl when trying to take part in football games.

She says that if a girl "plays well", the boys will often accept them, but not always.

"Some girls actually believe that it is a sort [of a thing] for boys and they have to know that other girls play soccer too."

Luiza, who is featured in the video about girls' football a few posts below, plays for the PSG Academy Brazil and Team Chicago Brazil.

She has a blog with more than 15,000 followers, and talks about her daily life as a female football player.

Luiza's goal is to turn professional.

Renata Mendonca, a journalist for BBC Brazil and a founder of football collective Dibradoras, is kicking off the discussion by arguing that women's exclusion from sport begins from a young age.

"Right in the beginning, when you are a little kid, you learn sport is not the space for you [as a girl], you shouldn't be there - this is the space for boys and for men."

She says this is why the majority of fans in football stadiums are men. There is "not something about the Y-chromosome that determines if someone is going to like football or not".

Listen to BBC Outside Source here or by clicking the sound icon at the top of the page.

The discussion starts in just a few minutes.

Adriana Behar is the general manager of sport planning for the Brazilian Olympic Committee and was the president of the Women’s Committee on Sport during Rio 2016. A former beach volleyball player, she was a silver medallist in the Athens and Sydney Olympic Games.

Maira Liguori is the director of ThinkOlga, an NGO dedicated to empowering women by sharing information. They strive to have women’s causes debated in the mainstream media and within society.

Beatriz Vaz E Silva, or Bia Vaz, is a professional footballer who played for the Brazilian national team as well as the Boston Breakers in the US National Women’s Soccer League.

Claudianny Drika is a community football coach in one of Rio’s favelas. She inspires young people in the community to realise their potential.

Fernanda Nunes is a Brazilian Olympic rower and blogger.

Brazil is known around the world as a football-mad nation.

But between 1941 and 1979, women were banned from playing as it was considered, among other things, “incompatible with the female form”.

Today, Brazil has world-class female footballers like Marta and Formiga. But women players still struggle to get resources, training and recognition.

Ana Luiza, 12, and Luiza, 13, both love football but are often teased or dismissed by the boys they play with.

This week, #TeamPlay will be trying to help girls like them feel more integrated in Brazil's thriving football culture.

Tune into the BBC World Service shortly to listen to our live discussion about sexism in sport...from a Rio beach.

Hello from Rio de Janeiro in Brazil - host of the 2016 Summer Olympics and the city where the fourth and final challenge of this year’s 100 Women season is taking place.

We have gathered a group of influential and inspiring women (#TeamPlay) who will spend the week coming up with ideas to fight sexism in sport.

To kick off the challenge, a global brainstorm session will be broadcast live on BBC World Service Radio’s Outside Source programme.

We will be hearing from Brazilian national footballers, Olympic athletes, sports journalists, activists and football coaches.

And we will be joined by young teenagers with dreams of becoming professional sportswomen.

You can listen live from 16:06 GMT (17:06 BST; 14:06 in Rio)

If you have any thoughts, please let us know on Twitter, external by using the hashtag #100Women.